Omnath, Locus of All

If you would lose unspent mana, that mana becomes black instead.
At the beginning of your precombat main phase, look at the top card of your library. You may reveal that card if it has three or more colored mana symbols in its mana cost. If you do, add three mana in any combination of its colors and put it into your hand. If you don’t reveal it, put it into your hand.

Awaken the Woods

Create X 1/1 green Forest Dryad land creature tokens. (They’re affected by summoning sickness.)

Callidus Assassin

Flash
Polymorphine — You may have Callidus Assassin enter the battlefield tapped as a copy of any creature on the battlefield, except it has “When this creature enters the battlefield, destroy up to one other target creature with the same name as this creature.”

Sigarda’s Imprisonment

Enchant creature
Enchanted creature can’t attack or block.
: Exile enchanted creature. Create a Blood token. (It’s an artifact with “, , Discard a card, Sacrifice this artifact: Draw a card.”)

Adeline, Resplendent Cathar

Vigilance
Adeline, Resplendent Cathar’s power is equal to the number of creatures you control.
Whenever you attack, for each opponent, create a 1/1 white Human creature token that’s tapped and attacking that player or a planeswalker they control.

Quintorius, Field Historian

Spirits you control get +1/+0.
Whenever one or more cards leave your graveyard, create a 3/2 red and white Spirit creature token.

Silverquill Command

Choose two —
• Target creature gets +3/+3 and gains flying until end of turn.
• Return target creature card with mana value 2 or less from your graveyard to the battlefield.
• Target player draws a card and loses 1 life.
• Target opponent sacrifices a creature.

Silverquill Command

Choose two —
• Target creature gets +3/+3 and gains flying until end of turn.
• Return target creature card with mana value 2 or less from your graveyard to the battlefield.
• Target player draws a card and loses 1 life.
• Target opponent sacrifices a creature.

Spell Burst

Buyback (You may pay an additional as you cast this spell. If you do, put this card into your hand as it resolves.)
Counter target spell with converted mana cost X.

Iron Verdict

Iron Verdict deals 5 damage to target tapped creature.
Foretell (During your turn, you may pay and exile this card from your hand face down. Cast it on a later turn for its foretell cost.)

Warhorn Blast

Creatures you control get +2/+1 until end of turn.
Foretell (During your turn, you may pay and exile this card from your hand face down. Cast it on a later turn for its foretell cost.)

Sylvan Library

At the beginning of your draw step, you may draw two additional cards. If you do, choose two cards in your hand drawn this turn. For each of those cards, pay 4 life or put the card on top of your library.

Magmatic Channeler

As long as there are four or more instant and/or sorcery cards in your graveyard, Magmatic Channeler gets +3/+1.
, Discard a card: Exile the top two cards of your library, then choose one of them. You may play that card this turn.

Umara Mystic

Flying
Whenever you cast an instant, sorcery, or Wizard spell, Umara Mystic gets +2/+0 until end of turn.

Magmatic Channeler

As long as there are four or more instant and/or sorcery cards in your graveyard, Magmatic Channeler gets +3/+1.
, Discard a card: Exile the top two cards of your library, then choose one of them. You may play that card this turn.

Zulaport Duelist

Flash
When Zulaport Duelist enters the battlefield, up to one target creature gets -2/-0 until end of turn. Its controller mills two cards. (They put the top two cards of their library into their graveyard.)

Moss-Pit Skeleton

Kicker (You may pay an additional as you cast this spell)
If Moss-Pit Skeleton was kicked, it enters the battlefield with three +1/+1 counters on it.
Whenever one or more +1/+1 counters are put on a creature you control, if Moss-Pit Skeleton is in your graveyard, you may put Moss-Pit Skeleton on top of your library.

Confounding Conundrum

When Confounding Conundrum enters the battlefield, draw a card.
Whenever a land enters the battlefield under an opponent’s control, if that player had another land enter the battlefield under their control this turn, they return a land they control to its owner’s hand.

Magmatic Channeler

As long as there are four or more instant and/or sorcery cards in your graveyard, Magmatic Channeler gets +3/+1.
, Discard a card: Exile the top two cards of your library, then choose one of them. You may play that card this turn.

Confounding Conundrum

When Confounding Conundrum enters the battlefield, draw a card.
Whenever a land enters the battlefield under an opponent’s control, if that player had another land enter the battlefield under their control this turn, they return a land they control to its owner’s hand.

Nimana Skydancer

Flash
Flying
When Nimana Skydancer enters the battlefield, target opponent mills two cards. (They put the top two cards of their library into their graveyard.)

Confounding Conundrum

When Confounding Conundrum enters the battlefield, draw a card.
Whenever a land enters the battlefield under an opponent’s control, if that player had another land enter the battlefield under their control this turn, they return a land they control to its owner’s hand.

Magmatic Channeler

As long as there are four or more instant and/or sorcery cards in your graveyard, Magmatic Channeler gets +3/+1.
, Discard a card: Exile the top two cards of your library, then choose one of them. You may play that card this turn.