-Flying
-When CARDNAME enters the battlefield, if you cast it, learn.
-As long as CARDNAME is in your graveyard, if you would learn, you may instead return CARDNAME to the battlefield.
2/2
-Flying, haste
-Whenever Goldspan Dragon attacks or becomes the target of a spell, create a Treasure token.
-Treasures you control have "t, Sacrifice this artifact: Add two mana of any one color."
4/4
-Flash
-You control your opponents while they're searching their libraries.
-While an opponent is searching their library, they exile each card they find. You may play those cards for as long as they remain exiled, and you may spend mana as though it were mana of any color to cast them.
3/2
It looks like they're finally lumping in all the supplemental products into the main set "count". Compare Anowon, the Ruin Thief to Wyleth. That explains why the Mana Confluence is #721.
-Look at the top five cards of your library. You may reveal any number of creature cards from among them and put the revealed cards into your hand. Put the rest on the bottom of your library in any order.
Lurrus of the Dream-Den1(W/B)(W/B)
Legendary Creature - Cat Nightmare (R)
-Companion - Each permanent card in your starting deck has converted mana cost 2 or less. (If this card is your chosen companion, you may cast it once from outside the game.)
-Lifelink
-During each of your turns, you may cast one permanent spell with converted mana cost 2 or less from your graveyard.
3/2
-Whenever Exuberant Wolfbear attacks, you may change the base power and toughness of target Human you control to Exuberant Wolfbear's power and toughness until end of turn. Sometimes the eludha is a sacred harmony of souls. Sometimes the bonder grabs some fur and holds on tight.
4/4
-Cryptic Trilobite enters the battlefield with X +1/+1 counters on it.
-Remove a +1/+1 counter from Cryptic Trilobite: Add CC. Spend this mana only to activate abilities.
-1, T: Put a +1/+1 counter on Cryptic Trilobite.
0/0
Surly Badgersaur3R
Creature - Badger Dinosaur (R)
-Whenever you discard a creature card, put a +1/+1 counter on Surly Badgersaur.
-Whenever you discard a land card, create a Treasure Token. (It's an artifact with "t, Sacrifice this artifact: Add one mana of any color.")
-Whenever you discard a noncreature, nonland card, Surly Badgersaur fights up to one target creature you don't control.
3/3
-If you control a commander, you may cast this spell without paying its mana cost.
-You may choose new targets for target spell of ability. Archmage attacks are little more than annoyances to Kalamax.
VIA https://www.twitch.tv/magicmics
Retriever Phoenix 2RR
Creature - Phoenix (R)
-Flying
-When CARDNAME enters the battlefield, if you cast it, learn.
-As long as CARDNAME is in your graveyard, if you would learn, you may instead return CARDNAME to the battlefield.
2/2
VIA https://twitter.com/AliEldrazi/status/1377790153180258308
Gnarled Professor 2GG
Creature - Treefolk Druid (R)
-Trample
-When CARDNAME enters the battlefield, learn.
5/4
VIA https://www.bilibili.com/video/BV1qX4y1G7Lz
Goldspan Dragon 3RR
Creature - Dragon (M)
-Flying, haste
-Whenever Goldspan Dragon attacks or becomes the target of a spell, create a Treasure token.
-Treasures you control have "t, Sacrifice this artifact: Add two mana of any one color."
4/4
VIA https://www.instagram.com/p/CJxgf0DFqKW/
VIA: https://www.twitch.tv/manacurves
Imoti, Celebrant of Bounty 3GU
Legendary Creature - Naga Druid (U)
-Cascade
-Spells you cast with converted mana cost 6 or greater have cascade.
3/1
Reshape the Earth 6GGG
Sorcery (M)
-Dearch your library for up to ten land cards, put them onto the battlefield tapped, then shuffle your library.
VIA: https://www.twitch.tv/magic
Jeweled Lotus 0
Artifact (M)
->, Sacrifice Jeweled Lotus: Add three mana of any one color. Spend this mana only to cast your commander.
EDIT: Also added Sky Diamond reprint.
Opposition Agent 2B
Creature - Human Rogue (R)
-Flash
-You control your opponents while they're searching their libraries.
-While an opponent is searching their library, they exile each card they find. You may play those cards for as long as they remain exiled, and you may spend mana as though it were mana of any color to cast them.
3/2
VIA https://www.gstonegames.com/article/detail-1795.html
They also previewed Ikra Shidiqi, the Usurper and Acidic Slime reprints, the former as an etched-foil.
EDIT: Added regular frame version and reprints.
VIA https://twitter.com/DanaFischerMTG/status/1248326009180454912
Lead the Stampede 2G
Sorcery (U)
-Look at the top five cards of your library. You may reveal any number of creature cards from among them and put the revealed cards into your hand. Put the rest on the bottom of your library in any order.
VIA https://twitter.com/MagicEsports/status/1247973315018276864
Almighty Brushwagg G
Creature - Brushwagg (C)
-Trample
-3G: Almighty Brushwagg gets +3/+3 until end of turn.
Laughed at the brushwagg
-Hunters' expression meaning
"died unexpectedly"
1/1
VIA https://twitter.com/Kripparrian/status/1247269442398101510
Lurrus of the Dream-Den 1(W/B)(W/B)
Legendary Creature - Cat Nightmare (R)
-Companion - Each permanent card in your starting deck has converted mana cost 2 or less. (If this card is your chosen companion, you may cast it once from outside the game.)
-Lifelink
-During each of your turns, you may cast one permanent spell with converted mana cost 2 or less from your graveyard.
3/2
VIA https://twitter.com/deejayknight/status/1247252737903013891?s=21
Cubwarden 3W
Creature - Cat (R)
-Mutate 2WW
-Lifelink
-Whenever this creature mutates, create two 1/1 white Cat creature tokens with lifelink.
3/5
VIA https://twitter.com/dogdog/status/1247237430912135169
Exuberant Wolfbear 3G
Creature - Wolf Bear (U)
-Whenever Exuberant Wolfbear attacks, you may change the base power and toughness of target Human you control to Exuberant Wolfbear's power and toughness until end of turn.
Sometimes the eludha is a sacred harmony of souls. Sometimes the bonder grabs some fur and holds on tight.
4/4
VIA https://www.youtube.com/watch?v=KEJuhdSJMBs
Cryptic Trilobite XX
Creature - Trilobite (R)
-Cryptic Trilobite enters the battlefield with X +1/+1 counters on it.
-Remove a +1/+1 counter from Cryptic Trilobite: Add CC. Spend this mana only to activate abilities.
-1, T: Put a +1/+1 counter on Cryptic Trilobite.
0/0
Surly Badgersaur 3R
Creature - Badger Dinosaur (R)
-Whenever you discard a creature card, put a +1/+1 counter on Surly Badgersaur.
-Whenever you discard a land card, create a Treasure Token. (It's an artifact with "t, Sacrifice this artifact: Add one mana of any color.")
-Whenever you discard a noncreature, nonland card, Surly Badgersaur fights up to one target creature you don't control.
3/3
VIA https://www.youtube.com/watch?v=zKha8eo7VC0&feature=youtu.be
Deflecting Swat 2R
Instant (R)
-If you control a commander, you may cast this spell without paying its mana cost.
-You may choose new targets for target spell of ability.
Archmage attacks are little more than annoyances to Kalamax.