Intimidator Initiate

Whenever a player casts a red spell, you may pay . If you do, target creature can’t block this turn.

Stonybrook Banneret

Islandwalk (This creature can’t be blocked as long as defending player controls an Island.)
Merfolk spells and Wizard spells you cast cost less to cast.

Brighthearth Banneret

Elemental spells and Warrior spells you cast cost less to cast.
Reinforce 1— (, Discard this card: Put a +1/+1 counter on target creature.)

Bosk Banneret

Treefolk spells and Shaman spells you cast cost less to cast.

Shields of Velis Vel

Changeling (This card is every creature type.)
Creatures target player controls get +0/+1 and gain all creature types until end of turn.

Fistful of Force

Target creature gets +2/+2 until end of turn. Clash with an opponent. If you win, that creature gets an additional +2/+2 and gains trample until end of turn. (Each clashing player reveals the top card of their library, then puts that card on the top or bottom. A player wins if their card had a higher converted mana cost.)

Hillcomber Giant

Mountainwalk (This creature can’t be blocked as long as defending player controls a Mountain.)

Elvish Branchbender

: Until end of turn, target Forest becomes an X/X Treefolk creature in addition to its other types, where X is the number of Elves you control.

Reminisce

Target player shuffles their graveyard into their library.

Howling Mine

At the beginning of each player’s draw step, if Howling Mine is untapped, that player draws an additional card.

Thick-Skinned Goblin

You may pay rather than pay the echo cost for permanents you control.
: Thick-Skinned Goblin gains protection from red until end of turn.

Bewilder

Target creature gets -3/-0 until end of turn.
Draw a card.

Fathom Seer

Morph—Return two Islands you control to their owner’s hand. (You may cast this card face down as a 2/2 creature for . Turn it face up any time for its morph cost.)
When Fathom Seer is turned face up, draw two cards.

Frozen Solid

Enchant creature
Enchanted creature doesn’t untap during its controller’s untap step.
When enchanted creature is dealt damage, destroy it.

Martyr of Ashes

, Reveal X red cards from your hand, Sacrifice Martyr of Ashes: Martyr of Ashes deals X damage to each creature without flying.

Seal of Doom

Sacrifice Seal of Doom: Destroy target nonblack creature. It can’t be regenerated.

Anthem of Rakdos

Whenever a creature you control attacks, it gets +2/+0 until end of turn and Anthem of Rakdos deals 1 damage to you.
Hellbent — As long as you have no cards in hand, if a source you control would deal damage to a permanent or player, it deals double that damage to that permanent or player instead.

Ocular Halo

Enchant creature
Enchanted creature has “: Draw a card.”
: Enchanted creature gains vigilance until end of turn.

Seal of Fire

Sacrifice Seal of Fire: It deals 2 damage to any target.

Stormscale Anarch

, Discard a card at random: Stormscale Anarch deals 2 damage to any target. If the discarded card was multicolored, Stormscale Anarch deals 4 damage instead.