msem-instigator

Destroy target artifact or enchantment. If that permanent was a token, proliferate. (Choose any number of permanents and/or players with counters on them, then give each another counter of each kind already there.)

When Blossom-Ash Trance enters, you gain 3 life.
At the beginning of each end step, if you gained 3 or more life this turn, draw a card.

When Blossom-Sower Witch enters, investigate. (Create a colorless Clue artifact token with “{2}, Sacrifice this artifact: Draw a card.”)
Whenever you sacrifice a permanent, you gain 1 life.

Target creature gets +2/+2 and gains hexproof until end of turn. (It can't be the target of spells or abilities your opponents control.)

Flying
When Blossoming Hatchling enters, create a Treasure token.

For each Aura you control, create a token that's a copy of that Aura.

Dominance — If you control the creature with the greatest power or tied for the greatest power, you may pay {U} rather than pay this spell's mana cost.
Counter target spell unless its controller pays {3}.

Exile target nonland permanent you control, then return that card to the battlefield under its owner's control. When it enters the battlefield as a creature, it deals damage equal to its power to target creature or planeswalker an opponent controls.

Destroy target artifact or land.

Flying, prowess

Prevent all combat damage that would be dealt to and dealt by creatures this turn.

You may have Blurry Counterpart enter as a copy of any creature on the battlefield.
Mirage {1}{U} (You may cast this spell as though it had flash for its mirage cost. If you do, sacrifice it at the beginning of the next cleanup step.)

Target creature gets +2/+2 until end of turn.
Fuse (You may cast one or both halves of this card from your hand.)

Create three 1/1 blue and red Pirate creature tokens with haste.

Until end of turn, target creature you control gains hexproof and has base power and toughness 4/4. (It can't be the target of spells or abilities your opponents control.)
Draw a card.

First strike
Whenever Bodyless Knight attacks, surveil 1. (Look at the top card of your library. You may put it into your graveyard.)

Whenever a creature dies, put a +1/+1 counter on Bog Apex.

When target creature dies this turn, return it to the battlefield under its owner's control. When you do, germinate. (Put a +1/+1 counter on a creature or create a 1/1 green Saproling creature token.)

Whenever another creature you control enters, you may have it gain haste. If you do, return it to its owner's hand at the beginning of the next end step.

Menace
When Bogborn Exorcist enters, you may discard a card. When you do, exile target instant or sorcery card with mana value 3 or less from an opponent's graveyard. Copy that card. You may cast the copy without paying its mana cost.

Bogchomper Juggernaut attacks each combat if able.
Bogchomper Juggernaut can't be blocked by Fungus, Saprolings, Plants, or Insects.

First strike
{T}: Bogclaw Sniper deals 2 damage to target blocking creature.

At the beginning of your upkeep, you may pay 3 life. If you do, create a 2/1 red Lizard creature token with frenzy 2. (Whenever it attacks and isn't blocked, it gets +2/+0 until end of turn.)

Enchant creature
When Bogfume Pact enters, each opponent sacrifices a creature.
When enchanted creature dies, return it to its owner's hand.

Whenever Boghex Witch deals combat damage to a cursed player, that player loses the game.
{2}{B}: Look at the top five cards of your library. You may reveal a Curse card from among them and put it into your hand. Put the rest on the bottom of your library in a random order.