Boros Aggro

Creature — Human Monk

Haste Prowess (Whenever you cast a noncreature spell, this creature gets +1/+1 until end of turn.)

P/T: 1/2

Creature — Bird Wizard

Flying, haste Whenever you cast a noncreature spell, this creature gets +2/+0 until end of turn. Plot {1}{R} (You may pay {1}{R} and exile this card from your hand. Cast it as a sorcery on a later turn without paying its mana cost. Plot only as a sorcery.)

P/T: 1/2

Creature — Mouse Soldier

Valiant — Whenever this creature becomes the target of a spell or ability you control for the first time each turn, put a +1/+1 counter on it. When this creature dies, it deals damage equal to its power to each opponent.

P/T: 1/1

Creature — Mouse Warrior

Haste Prowess (Whenever you cast a noncreature spell, this creature gets +1/+1 until end of turn.) Valiant — Whenever this creature becomes the target of a spell or ability you control for the first time each turn, exile the top card of your library. Until end of turn, you may play that card.

P/T: 2/2

Creature — Mouse Soldier

Offspring {2} (You may pay an additional {2} as you cast this spell. If you do, when this creature enters, create a 1/1 token copy of it.) At the beginning of combat on your turn, target Mouse you control gains your choice of double strike or trample until end of turn.

P/T: 1/2

Creature — Spirit

Haste Whenever this creature is dealt damage, it deals that much damage to any other target. If a player is dealt damage this way, they can't gain life for the rest of the game.

P/T: 3/3

Instant

Kicker {4} (You may pay an additional {4} as you cast this spell.) Burst Lightning deals 2 damage to any target. If this spell was kicked, it deals 4 damage instead.

Instant

Lightning Strike deals 3 damage to any target.

Instant

Choose one — • Boros Charm deals 4 damage to target player or planeswalker. • Permanents you control gain indestructible until end of turn. • Target creature gains double strike until end of turn.

Instant

This spell costs {1} less to cast for each creature that attacked this turn. Witchstalker Frenzy deals 5 damage to target creature.

Instant

Target creature gets +2/+0 until end of turn. Create a Monster Role token attached to it. (If you control another Role on it, put that one into the graveyard. Enchanted creature gets +1/+1 and has trample.)

Land — Mountain Plains

({T}: Add {R} or {W}.) As this land enters, you may pay 2 life. If you don't, it enters tapped.

Land

This land enters tapped unless you control two or fewer other lands. {T}: Add {R} or {W}.

Land — Mountain Plains

({T}: Add {R} or {W}.) This land enters tapped. When this land enters, surveil 1. (Look at the top card of your library. You may put it into your graveyard.)

Land

{T}: Add {C}. {T}: Add {R} or {W}. This land deals 1 damage to you.

Basic Land — Mountain

({T}: Add {R}.)

Basic Land — Plains

({T}: Add {W}.)