msem-instigator

When Savagery Evergrowing enters, create two 3/2 green Horror creature tokens.
Whenever a Horror you control dies, put a +1/+1 counter on each Horror you control.

Whenever you discard a card, choose up to one that hasn't been chosen this turn —
• Draw a card.
• Tap target creature. Put a stun counter on it.
• Create a 2/2 blue Jellyfish enchantment creature token with flying.

Whenever another nontoken creature you control dies, create a 1/1 black Rat creature token with “This creature can't block” if this is the first time this ability has resolved this turn. Otherwise, Ffion, Famine Warcaller deals 1 damage to each player.

First strike
Whenever a creature dealt damage by Mournful Newborn this turn dies, transform Mournful Newborn.

When Genome Mapper enters, create a Function token with “Create an X/X green Mutant creature token, where X is this spell's mana value.” (It's an enchantment. As you cast an instant or sorcery spell, sacrifice any number of Functions to add their effects to that spell.)

Cesspool Scrapper can't block.
{5}{U}, Exile Cesspool Scrapper from your graveyard: Draw two cards.

{1}, Sacrifice Ruinous Proselyte: Destroy target artifact or nonbasic land.

Create two 1/1 red and white Warrior creature tokens. Those tokens gain first strike until end of turn.

Flash (You may cast this spell any time you could cast an instant.)
When Gorillas in the Mist enters, prevent all combat damage that other creatures would deal this turn.

When Sunset Monastery enters, draw a card, then put a card from your hand on the bottom of your library.
{T}: Add {C}.

Create a 1/1 white Peasant creature token if you control a Citizen or Peasant. Then Byron's Reprisal deals damage equal to the number of creatures you control to up to one target creature or planeswalker.

Golden age (If you cast an instant or sorcery spell, activated a nonmana ability, and attacked this turn, enter a renaissance for this game.)
Sacrifice another creature: Grotesque Defiler gains flying until end of turn.
Whenever Grotesque Defiler deals combat damage to a player, if you're in a renaissance, that player discards a card.

Flying
When Dealer of Pointed Fortunes enters, proliferate. (Choose any number of permanents and/or players with counters on them, then give each another counter of each kind already there.)

Spawn of Andazir enters with X +1/+1
counters on it.
Lionize {2}{G} ({2}{G}, Exile this card from your hand:
Put a +1/+1 counter on target creature and it gains the following ability until end of turn. You may cast this card on a later turn from exile.)
Whenever this creature deals damage to a player or noncreature permanent, double the number of +1/+1
counters on it.

Menace, trample
Hellfreaks gets +1/+0 for each Curse you control.
Hellfreaks gets +1/+0 for each instant and sorcery card you own in exile and in your graveyard.

Creatures can't attack you unless their controller pays {2} for each of those creatures.
At the beginning of each opponent's end step, if you didn't lose life this turn, you get a glory counter. (You lose glory counters before life. A player with ten or more glory counters wins the game.)

Apostle of the Elders has lifelink as long as it has a +1/+1 counter on it.

Choose two —
• Shuffle up to two target cards from graveyards into their owners' libraries.
• Create a 1/1 black Skeleton creature token. You lose 1 life.
• Sacrifice a permanent. Draw a card.

({T}: Add {B}.)
Shadowed Slums enters tapped.
{B}, {T}, Reveal a black card from your hand: Target player loses 1 life.

This spell costs {2} less to cast for each creature that died this turn.
Flying, trample

Zombiecycling {1}{B} ({1}{B}, Discard this card: Search your library for a Zombie card, reveal it, and put it into your hand, then shuffle.)
Unearth {1}{B} ({1}{B}: Return this card from your graveyard to the battlefield. It gains haste. Exile it at the beginning of the end step or if it would leave the battlefield. Unearth only as a sorcery.)

Until end of turn, target creature loses all abilities and has base power and toughness 1/1. If it's attacking, counter all triggered abilities from that source.

Target creature gets +2/+1 until end of turn. If it's a Pirate or Rogue, it gains first strike until end of turn.

Exile all creature cards from target player's graveyard. For each creature card exiled this way, search that player's library for any number of cards with the same name as that card and exile them. Then that player shuffles.

Whenever Heroic Exemplar attacks, if its power is greater than its base power, other creatures you control get +1/+1 until end of turn.