msem-instigator

Enchant creature
Whenever enchanted creature attacks, up to two target creatures can't block this turn. Up to one target creature blocks this turn if able.

This spell costs {1} less to cast for each creature that attacked this turn.
Hot to the Touch deals X damage to any target.

Hostile Habitat deals 2 damage to each creature.
Leitmotif (If you cast this spell from your hand, exile it as it resolves. When you next cast a spell that shares a color with this card, you may cast this from exile without paying its mana cost.)

Head on Collision deals 2 damage to any target.
Leitmotif (If you cast this spell from your hand, exile it as it resolves. When you next cast a spell that shares a color with this card, you may cast this from exile without paying its mana cost.)

When Hardened Explorer enters, choose one —
• Destroy target artifact.
• Put a +1/+1 counter on Hardened Explorer. It gains haste.

Galactic Detonation deals 2 damage to any target.
Augmented — If you've spent {W}{U}{B}{R}{G} to cast spells this turn, Galactic Detonation deals 5 damage instead.

{T}, Sacrifice an artifact or creature: Fracking Factory deals 2 damage to each opponent. Activate only as a sorcery.

Fiery Erasure deals 3 damage to target creature or planeswalker. If that permanent would die this turn, exile it instead.

Gain control of target nonland permanent until end of turn. Untap it. It gains haste until end of turn.

Destroy all nonenchantment permanents. If thirty or more lands were destroyed this way, you win the game.

Menace, haste

Copy target instant or sorcery spell you control. You may choose new targets for the copy.

When Crystal Vision Abomination enters, create a 1/1 blue Elemental creature token with flying.
Whenever an Elemental you control attacks, that creature gets +1/+0 and first strike until end of turn.

Destroy target artifact. Create two 1/1 colorless Servo artifact creature tokens.

Menace, haste
Cadence (Whenever you cast a spell, if its mana value is greater than this creature's power, put a +1/+1 counter on this creature.)

You may cast this spell as though it had flash if it targets a creature or planeswalker.
Burning Up deals X damage to any target, where X is the number of basic land types among lands you control.

Haste
Augmented — Whenever you cast a spell, if you've spent {W}{U}{B}{R}{G} to cast spells this turn, put a +1/+1 counter on Bolstered Guardian. It loses this ability and gains “Whenever this attacks, it deals 2 damage to each of up to two targets.”

Target creature gets +3/+2 and gains trample until end of turn.

Whenever you cast a noncreature spell, Architect of Calamity deals 2 damage to each opponent.

Menace
Cadence (Whenever you cast a spell, if its mana value is greater than this creature's power, put a +1/+1 counter on this creature.)

This spell costs {X} less to cast, where X is the greatest power among creatures you control.
Abandon Life and Hope deals 5 damage to target creature or planeswalker.

When 11-A Lionheart enters, it deals 2 damage to each nonartifact creature.

Target opponent reveals their hand. You choose a nonland card from it. Exile that card. You lose 2 life.
Augmented — Then if you've spent {W}{U}{B}{R}{G} to cast spells this turn, you may cast that card without paying its mana cost.

Stratospheric Bombardment deals X damage to any target and you gain that much life.

As an additional cost to cast this spell, exile X cards from your graveyard.
Choose one —
• Target player mills X cards.
• Look at the top X cards of your library. Put one into your hand, and the rest on the bottom of your library in any order.