msem-instigator

Search your library for up to two basic land cards, reveal those cards, put one onto the battlefield tapped and the other into your hand, then shuffle.
Draw a card.

Melee (Whenever this creature attacks, it gets +1/+1 until end of turn for each opponent you attacked this combat.)
When Aith Aera Sentinel enters, create a 1/1 green Elf creature token.

Whenever a creature token you control enters, put a +1/+1 counter on target creature you control.

At the beginning of each upkeep, if no spells were cast last turn, create a 2/2 green Wolf creature token.
{3}{R/G}{R/G}: Albin, the Huntmaster and creature tokens you control get +2/+2 and gain trample until end of turn.

At the beginning of your upkeep, you may pay {1}{G/U}. If you do, proliferate. (Choose any number of permanents and/or players with counters on them, then give each another counter of each kind already there.)
At the beginning of your end step, you may pay {1}{G/U}. If you do, populate. (Create a token that's a copy of a creature token you control.)

When Cloven Forms enters, reveal the top three cards of your library. Put all creature cards revealed this way into your hand and the rest into your graveyard.
{5}{G}{G}{G}, Exile Cloven Forms: Put a creature card from or hand or command zone onto the battlefield. Create a token that's a copy of it, except the token isn't legendary.

When Convocation Elder enters, create two 1/1 green Elf creature tokens.
{1}{G}, Discard Convocation Elder: Create a 1/1 green Elf creature token. Draw a card. Activate only as a sorcery.

Reach
Improve {1}{G/W} ({1}{G/W}: 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.)
If one or more +1/+1 counters would be put on a creature you control, that many plus one +1/+1 counters are put on that creature instead.

Melee (Whenever this creature attacks, it gets +1/+1 until end of turn for each opponent you attacked this combat.)
Corym's Elite can't be blocked by creatures with power 2 or less.

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.

Creatures you control get +2/+2 and gain vigilance and trample until end of turn.

Search your library for a basic land card, reveal it, put it into your hand, then shuffle. Create a 1/1 green Elf creature token.

Enchant noncreature permanent
Enchanted permanent is a colorless Forest land. (It has “{T}: Add {G}.”)

Enchant creature
When Fists of Ironwood enters, create two 1/1 green Saproling creature tokens.
Enchanted creature has trample.

At the beginning of your end step, untap all lands you control. You may put three +1/+1 counters on target land you control. If you do, that land becomes a 0/0 Treefolk creature with haste that's still a land.

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.

At the beginning of combat on your turn, create a 1/1 green Elf creature token. That token gains haste until end of turn and attacks this combat if able.
At the beginning of your postcombat main phases, if three or more creatures you control dealt combat damage to a player or planeswalker this turn, add three mana of any one color.

Trample
Gloamrazer Hydra enters with four +1/+1 counters on it.
Whenever a nontoken creature you control dies, if it was embattled, create an X/X green Hydra creature token, where X is that creature's power. (A creature is embattled if it has a counter on it or has a permanent you control attached to it.)

Reach, trample
Improve {1}{B/G} ({1}{B/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.)
Whenever one or more +1/+1 counters are put on Gorganith, Ruin Maw, you may search your library and/or graveyard for a creature card with mana value equal to or less than the number of +1/+1 counters on Gorganith and put it onto the battlefield. If you search your library this way, shuffle.

Enchant creature
You may cast this spell from your graveyard if it targets a legendary creature you control.
Enchanted creature gets +2/+2 and has trample.

Target creature you control deals damage equal to its power to target creature you don't control. If the creature you control is legendary, excess damage is dealt to that creature's controller instead.

Reach, trample
{1}{G}: You may remove a counter from a creature you control. If you do, tap that creature and it gains indestructible until end of turn.

{7}{G}: Distribute three +1/+1 counters among up to three target creatures you control. This ability costs {2} less to activate if you control a legendary creature.

Put a +1/+1 counter on up to one target creature. Untap it. You gain 3 life.

Create two 1/1 green Elf creature tokens, then up to one target creature gets +X/+X until end of turn, where X is the number of creatures you control. (Targets are chosen before the tokens are created.)