msem-instigator

Give any number of permanents and/or players with counters on them another counter of each kind already there. Whenever you cast a spell this turn, repeat that process.

Whenever you cast a spell you don't own, you may pay {1}{U}. If you do, put target nonland permanent on top of its owner's library.
{2}{B}: Exile the top card of target opponent's library face down. You may look at and cast that card for as long as it remains exiled, and you may spend mana as though it were mana of any type to cast that spell.

Put a +1/+1 counter on each creature you control. Repeat this process if you control a Soldier. Repeat this process again if you control a Knight.

When Golden Grizzly enters, create an Idol token. (It's an artifact with “{1}, Sacrifice this artifact: Put a +1/+1 counter on target creature. Activate only as a sorcery.”)

Slipstream (This creature can't be blocked as long as only creatures with slipstream are attacking.)
Whenever Goldtooth Slasher attacks, you may sacrifice an artifact or creature. If you do, Goldtooth Slasher gets +2/+0 and gains lifelink until end of turn.

Spells you cast with mana value 4 or greater cost {1} less to cast.

When Golna, the First Shah enters, create Shir, a legendary 3/3 white Cat creature token with trample.
Monument {5}{G}{G} (You may cast this transformed from your graveyard for its monument cost. Exile it if it would leave the battlefield or not resolve.)

Choose one —
• Draw two cards, then discard a card.
• Counter target spell unless its controller pays {3}.

{T}: Add {W} or {B}.
{W}{B}, {T}: Each opponent loses 1 life and you gain 1 life.

Whenever a creature enters under an opponent's control, you may pay 2 life. If you do, draw a card.

{3}{G}, {T}: Create a 2/2 green Wolf Elemental creature token.

Whenever equipped creature attacks, exile target nonland permanent until Grab Bag leaves the battlefield.
Whenever equipped creature deals combat damage to a player, put a card exiled with Grab Bag onto the battlefield under your control.
Equip {3}

Enchant land
When Grace of Timber enters, put a +1/+1 counter on target creature you control.
Enchanted land has “{T}: Add two mana of different colors.”

Flying
Unveil {3}{W}{U} ({3}{W}{U}: Transform this. Unveil only as a sorcery.)

Flash
If a +1/+1 counter would be put on another creature, that counter is put on Grafted Physician instead.

When Graide, Voice of Autumn enters, create X 1/1 green Squirrel creature tokens.
Squirrels you control get +1/+0 and have haste.
Nonbasic lands your opponents control enter tapped.

This spell costs {2} less to cast if you control a legendary creature.
Return up to X target instant and/or sorcery cards from your graveyard to your hand. Draw X cards. Exile Grand Arcana.

Each creature you control that's enchanted or is an enchantment gets +1/+1.
{2}{W}{W}: You may reveal an enchantment card you own from outside the game and put it into your hand.

Defender
{2}, {T}, Sacrifice Granite Watchers: It deals 3 damage to target creature.

Flying
Whenever Granter of Weariness enters or attacks, you may tap target creature if its power is less than or equal to the number of Elementals you control.

{1}{B}, Discard a card: Exile target creature card from your graveyard. Create a token that's a copy of that card, except it's a 5/5 black Horror.

Grasp of the Sands deals 5 damage to target attacking or blocking creature. Scry 1.

Whenever Grasping Carriage attacks, target creature an opponent controls can't block this turn.
Crew 1 (Tap any number of creatures you control with total power 1 or more: This Vehicle becomes an artifact creature until end of turn.)

Reach

When Grave Wrangler enters, you may return target creature card from your graveyard to your hand.