msem-instigator

When Daughter of Calenfyr enters, you may search your library for a basic land card, reveal it, put it into your hand, then shuffle.
When Daughter of Calenfyr dies, you may put a land card from your hand onto the battlefield tapped.

Deathtouch
{3}{G}: Deathcoil Cobra gains indestructible until end of turn.

{T}: Add {G}. If a -1/-1 counter was put on a creature you control this turn, add {G}{G} instead.

When Defiant Bristles dies, put a +1/+1 counter on target creature.

When Disciple of the Buried Glade leaves the battlefield, create a 3/3 green Elemental creature token.

When Doomed Woodsman dies, create a 1/1 green Faerie Druid creature token with hexproof.

When Dualglaive Acolyte enters, create a green Aura enchantment token named Calamighty attached to target creature. The token has enchant creature and “Enchanted creature gets +1/+1 and can't be blocked by creatures with power 2 or less.”

When Dunecrest Pariah enters, you may search your library for a basic land or Desert card, reveal it, put it into your hand, then shuffle.
{T}, Sacrifice Dunecrest Pariah: You may put a land card from your hand onto the battlefield tapped.

When Dutiful Camel enters, put a +1/+1 counter on target creature you control.

{T}: Add {G}.

{G}: Each player exiles a card from their graveyard. If an instant or sorcery card is exiled this way, put a +1/+1 counter on Earthfeeder Worm.
Remove X +1/+1 counters from Earthfeeder Worm and sacrifice it: Exile X target cards from graveyards.

Whenever a land you control enters, upgrade target creature. (Give it one of the listed counters it doesn't already have.)
• +1/+1
• Vigilance
• Trample

{1}{G}, Sacrifice Edgeland Savant: Draw a card. You may put a land card from your hand onto the battlefield tapped.

When Elven Guard becomes the target of a spell you control, you may pay {G}. If you do, transform it.

Whenever a Role is attached to a creature you control or you cast a spell that targets a creature you control, put a +1/+1 counter on Enthusiastic Admirer.

Whenever Eternal Scout attacks, untap each other creature you control.

At the beginning of combat on your turn, if you control a creature with power greater than Ever-Gnawing Rat's, put a +1/+1 counter on Ever-Gnawing Rat.

{T}: Create an X/X green Elemental creature token, where X is Evoker of the Ancient Form's power.

When Evolving Elemental enters, scry 3, then reveal the top card of your library. Put a number of +1/+1 counters on Evolving Elemental equal to that card's mana value.

When Far-Realm Guardian enters, create a green Aura enchantment token named Wild Bounty attached to target creature. The token has enchant creature and “Enchanted creature gets +1/+1 and has ward {2}.”

{G}, {T}: Add {C}{C}.

{1}{G}, {T}, Sacrifice another nontoken creature: Create two tokens that are copies of the sacrificed creature, except they're 0/1. Activate only as a sorcery.

Improve {G} ({G}: Put a +1/+1 counter on this creature. This costs {1} more to activate for each +1/+1 counter on it. Improve only as a sorcery.)
When Frontier Trackers dies, create a 1/1 green Elf creature token.

When GenTech Assistants enters, create an X/X green Mutant creature token.

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.)