Tolo, the Sleep-bringer2UU
Legendary Creature - Homunculus
At the beginning of each player's upkeep, put a sleep counter on Tolo, the Sleep-bringer.
Creatures get -X/-0 where X is the number of sleep counters on Tolo.
If a creature's power would increase, it stays the same instead.
Creature - Human Scout
Reach Heroic - Whenever you cast a spell that targets Kruphix's Rider, put a +1/+1 counter on Kruphix's Rider.
Whenever Kruphix's Rider attacks, creatures defending player controls get -1/-0 until end of turn for each +1/+1 counter on Kruphix's Rider.
Rider of Slaughter2RB
Creature - Human Warrior
Heroic - Whenever you cast a spell that targets ~, put a +1/+1 counter on ~.
Whenever ~ attacks, you may pay 3 life. If you do destroy target creature with power less than or equal to the number of +1/+1 counters on ~.
Creature - Insect Illusion
Toxic Courier can't be blocked if defending player has 6 or more poison counters. "It's like a milkman. A deadly, deadly milkman."
-Jeorg, maker of bad observations
Creature - Minotaur Wizard Soldier
Spherestrobe Marshal can't be blocked.
Whenever Spherestrobe Marshal attacks, up to two other target creatures each get +2/+0 and gain double strike until end of turn.
Task Mage Restiveness3R
Whenever a player taps a permanent for mana, that player adds an additional C. 5: Choose target instant or sorcery spell, then flip a coin. If you win the flip, that spell's controller copies it and may choose new targets for the copy. If you lose the flip, counter that spell. Any player may activate this ability. 5: Return target instant or sorcery card from your graveyard to your hand. Any player may activate this ability.
Spark Goblin Pits4R
Lands have "T: Add R." RRRRR: Create a 1/1 red Goblin creature token. Any player may activate this ability.
Sacrifice a Goblin: Copy target instant or sorcery spell. Any player may activate this ability.
Thunder Over KuldothaXRRR
Affinity for artifacts
Destroy all artifacts with converted mana cost X or less. Thunder Over Kuldotha deals X damage to each creature, planeswalker, and player. This damage can't be prevented.
Destroy all artifacts with converted mana cost 1 or less. Ferocious — If you control a creature with power 4 or greater, instead destroy all artifacts with converted mana cost 4 or less.
Creature - Elemental
Damage that would be dealt to and dealt by Neai's Breath can't be prevented.
Neai's Breath can block only creatures that have been dealt damage this turn.
Writhing Mana-Wall + Quirion Ranger Writhing Caryatid1RG
Defender t:Add G. Writhing Caryatid deals 1 damage to itself.
Return a Forest you control to its owner's hand: Untap Writhing Caryatid.