msem-instigator

{T}, Discard a card: Draw a card.
{2}{R}, {T}: Copy target instant or sorcery spell you control. You may choose new targets for the copy. Activate only if you have four or more instant and/or sorcery cards in your graveyard.

Whenever you sacrifice a permanent, Overseer of Armies deals 1 damage to each opponent and each battle they protect.

Whenever Passionate Painter becomes untapped, you may discard a card. If you do, draw a card, then transform Passionate Painter.

{1}{R}: Performer of Desire gets +1/+1 and gains menace until end of turn. Then if its power is 4 or greater, you may transform it.

Whenever a noncreature permanent enters, Petaldiver deals 1 damage to that permanent's controller.

Flying, haste
Whenever Phoenix of Agonas attacks, you may discard a card. If you do, draw a card.
{4}{R}: Return Phoenix of Agonas from your graveyard to your hand. This ability costs {X} less to activate, where X is your devotion to red. (Each {R} in the mana costs of permanents you control counts toward your devotion to red.)

Whenever Practical Battlemage attacks, catalyze. (The next spell you cast this turn costs {1} less to cast.)

As an additional cost to cast this spell, pay {2} or reveal an instant or sorcery card from your hand.

When Primordial Progenitor dies, create two 1/1 red Elemental creature tokens.

Flying
{3}: Prismscale Dragon gets +1/+1 until end of turn for each color of mana spent to activate this ability.

Menace, haste

Chronicle (As this enters and after your draw step, add a lore counter. Stop after III.)
[Lore I-II] Purphoros's Gemback deals 1 damage to target player or planeswalker.
[Lore III] Create a Treasure token. (It's an artifact with “{T}, Sacrifice this artifact: Add one mana of any color.”)

{T}: Quill Sniper deals 1 damage to any target if it's an opponent or if you control a storied permanent. (Enchantments and legendary permanents are storied.)

Haste
Whenever you cast a noncreature spell, put a +1/+1 counter on Rahstahde's Firefist. It gains menace until end of turn.

When Rakkiri Aspirant enters, if you control an embattled creature, exile the top card of your library. Until end of turn, you may play that card. (A creature is embattled if it has a counter on it or has a permanent you control attached to it.)

Haste
Whenever a player casts a spell, Rakkiri Dissident deals 1 damage to that player.

Haste
Whenever Rapid Rodent attacks, it gets +1/+0 until end of turn for each other creature you control with flash and/or haste.

Double strike

Haste
Whenever Reckless Pyremage becomes tapped, it deals 1 damage to each creature and each player.

Whenever another creature named Reminiscing Youth you control enters, you may discard a card. If you do, draw a card.

Wanderlust — When Riftbreaker Mage dies, if you control four or more differently named lands, Riftbreaker Mage deals damage equal to its power to each opponent.

{1}{R}: Roaring Dracowyrm gets +2/+0 until end of turn. Activate only once each turn.

When Roseblood Hart enters, choose one —
• Destroy target artifact.
• Create a Treasure token.

When Rubble Seer enters, you may sacrifice a land or exile a land card from your graveyard. If you do, exile the top card of your library. Until the end of your next turn, you may play that card.

Flash
First strike (This creature deals combat damage before creatures without first strike.)