Create a 1/1 black Nightmare creature token with shadow.
Create a 2/2 black Nightmare Zombie creature token with shadow.
Create a 3/3 black Nightmare Beast creature token with shadow.
Yanron, Chosen by the Moon1UU
Legendary Creature - Moonfolk Cleric
Flying X, return X lands you control to its owner's hand: Search your library for a Moonfolk with converted mana cost X or less, put it on the battlefield, then shuffle your library. Return it to your hand at the beginning of your next end step.
Creature - Human Wizard
Whenever you shuffle your library, you may reveal the top card of your library. If it is a permanent you may put it into your hand. Otherwise, you may put it into your graveyard.
Phyrexian Rebirth Chamber2BB
Whenever a non-token creature dies, if it had at least a -1/-1 counter on it, exile it, then create a 0/0 black Horror creature token with X +1/+1 counters on it where X is the number of -1/-1 counters exiled creature had.
Hall of the Coalition
Hall of the Coalition enters the battlefield tapped. T, Pay 1 life: Add one mana of any color. 1, T: Add WUBRG. Activate only if you control a land of each basic land type, five or more legendary nonland permanents and at least one legendary permanent of each color.
Creature - Cleric
Praetor spells you cast cost 2 less to cast.
Whenever a Praetor enters the battlefield under your control, it gais indestructible until your next turn and you sacrifice Norn's Orator. 2/2
Rise of the Depths1UU
Whenever a Kraken, Octopus, Serpent or Leviathan creature you control attacks, put a Depth counter on ~. 1U: Exile target Kraken, Octopus, Serpent or Leviathan creature. Return it to the battlefield under your control.
At the beginning of your end step, if there are eight or more Depth counters on ~, create an 8/8 Blue Octopus creature token with "This creature can block up to eight creatures."
Creature - Faerie
When Midsummer's Envoy enters the battlefield, you may untap X target creatures. For each creature you do not control untapped this way, put a +1/+1 counter on Midsummer's Envoy.
[B]Tower Construction(/B] 2GW
If your commander's power is 0, it costs 2 less to cast for each time it's been cast from the command zone this game.
If you control no creatures with defender, sacrifice [CARDNAME].
Creature - Goblin Coward
Whenever you cast your Commander from somewhere other than the Command zone, you may pay mana as if you had. If you do, put a +1/+1 counter on another target creature for each Red mana spent above your Commander's converted mana cost and deal that much damage to Raid-Mob Seditionist.
Lieutenant's Horn enters the battlefield tapped with a charge counter. T: Add C. X, T, remove a charge counter from Lieutenant's Horn: Put your commander with converted mana cost X onto the battlefield from the command zone.
Commander's Maddening Memorial4
Artifact 3T, discard your hand, sacrifice ~: choose one of your commanders in the command zone, in exile or in your graveyard, put it onto the battlefield under your control.
Cunning of the Time Mage2U
Whenever one permanent you control phases out, put a time counter on ~.
At the beginning of your end phase, if ~ has 10 or more time counters on it, remove all time counters from ~ and take an extra turn after this one.
Ringing Scimitar Askaris4RR
Creature - Human Knight
When Ringing Scimitar Askaris enters the battlefield, create a 2/2 red Efreet Knight creature token with haste and flanking.
Whenever one or more Knights you control deals combat damage to a player, you may cast an instant, sorcery, or Knight card from your graveyard with converted mana cost equal to or less than the amount of damage dealt without paying its mana cost.
Creature - Nightmare Sphinx
When Wormfang Sphinx enters the battlefield, fateseal 3, then exile the top card of your deck. (To fateseal 3, look at the top three cards of an opponent's library, then put any number of them on the bottom of that player's library and the rest on top in any order.)
When Wormfang Sphinx leaves the battlefield, return the exiled card to the top of its owners deck.
The reason it's either is that the Wormfang mechanic is actually re-identified to White, through cards like Oblivion Ring, and there's some White scrying in the game. So the mechanic could work in either color.
Enchantment - Aura
When Empyrial Crown enters the battlefield, if you control no tapped lands, draw two cards. Otherwise, discard a card.
Enchanted creature gets +1/+1 for each card in your hand.
Suspend 3 - UU
Spirit of the Mysterious Device3UU
Creature - Spirit Golem
Flying, hexproof from nonartifact T: You may sacrifice Spirit of the Mysterious Device rather than pay the activation cost of the activated ability of an artifact or artifact card this turn.
Creature - Elemental Nightmare
Burning Bogspawn gets +1/+1 for each Swamp you control.
Whenever a Forest enters the graveyard, Burning Bogspawn gains Trample and +0/+2
Whenever a Mountain enters the battlefield, Burning Bogspawn gains First Strike and +2/+0
Mirror of two reflections1URG
Artifact GUT: until end of turnm if you would create one or more tokens, create that many tokens plus one instead. URT: until end of turn, next time you would copy a spell, copy that spell twice instead, you may choose new targets for each copy.
Creature - Human Cleric
Whenever a creature attacks you or a Planeswalker you control while Reyan Sword-Saint is in the graveyard, you may pay 3WW. If you do, return it to the battlefield transformed, then it Fights that creature.
4/2 For the whole of his life, he held the stories of Reya Dawnbringer as his guiding truths.
(W) Creature - Angel Soldier
When Serran Guardian leaves the battlefield, you may pay 3WW. If you do, return target creature card with converted mana cost five or less from your graveyard to the battlefield and return Serran Guardian to your hand.
4/4 For two-hundred generations, he has ensured Serra's sacrifice was not in vain.
The balancing thought is that it takes a lot to recur the revival. You have to cast Reyan Sword-Saint again for three mana, get it killed, pay five to return Serran Guardian (with a 4/4 Fight), then get that killed (can just Fight something with 4 or more Power) and pay another five to get the revival. Thirteen mana and two deaths to deal four damage to a creature and revive a CMC five or less creature.
The tie-in is that Sephara likes to run a lot of board wipes, since it's a high-Flying mono-white creature-focused deck that'll ignore most of the damage and just re-cast Sephara with the alternate cost. So you can reliably kill the sword-saint to get a grave-castable Serra Angel to Fight an attacker, with the option to instead return it to hand to recover a different CMC 5 creature, at the cost of needing to go through Reyan Sword-Saint again... Which, if you have a board wipe lined up, is just fine.