msem-instigator

Flying
When this creature enters, put a -1/-1 counter on a creature you control.

{1}, Sacrifice a creature: Each opponent loses 1 life.
Whenever a creature dies, you gain 2 life.

When Gamhaugen Stablehand enters, put a +1/+1 counter on target creature you control. You gain 1 life.

Fires of Renewal deals 2 damage to each creature.
Create a Treasure token.

Trample
Players can't activate abilities of nonbasic, noncreature permanents.

You may have Mutalithic Golem enter as a copy of any land on the battlefield, except it's an artifact in addition to its other types.

Whenever Devourer of Legacy deals combat damage to a player, you may sacrifice it and choose a nonland card name. If you do, search that player's graveyard, hand, and library for any number of cards with that name and exile them. That player shuffles, then draws a card for each card exiled from their hand this way.

Choose target creature you control. Double its power and toughness until end of turn. That creature deals X damage divided as you choose among any number of target creatures and/or planeswalkers your opponents control, where X is its power.

Shadow Ball deals 2 damage to target creature or planeswalker and 2 damage to its controller. You gain 2 life.

Flash
When Swift Savior enters, if you control a legendary creature, you may have Swift Savior deal 2 damage to target attacking or blocking creature.

When Divine Theurge enters, choose one —
• Return target enchantment card from your graveyard to your hand.
• Return target creature card with power 2 or less from your graveyard to your hand.

Each player sacrifices six permanents.

Target player discards two cards. If a creature you control died this turn, that player loses 2 life.

Whenever a land you control enters, you gain 1 life.
{3}{G}, Sacrifice Sower of Spring: Search your library for up to two basic land cards, put them onto the battlefield tapped, then shuffle.

Equipped creature gets +2/+2 and has hexproof and vigilance.
Equip {2}

Whenever Passionate Painter becomes untapped, you may discard a card. If you do, draw a card, then transform Passionate Painter.

{U}, Sacrifice Imperious Nixie: Return target creature to its owner's hand.

Trample
When Leyran Alpha enters, create two 2/2 green Wolf creature tokens with haste.
Whenever a creature you control deals damage to an opponent, put a +1/+1 counter on that creature.

{W}, {T}: Target attacking creature gets +1/+1 until end of turn. This ability costs {W} less to activate if it targets a Soldier.

Valdez's Strike Leader can't be blocked if you have more cards in hand than defending player.

When Ageless Ascetic enters, return up to one target instant or sorcery card from your graveyard to your hand.

At the beginning of combat on your turn, for each permanent type, aetherize up to one target permanent you control of that type. (To aetherize, create a token that's a copy of it, then exile that token.)

You may play an additional land on each of your turns.
Whenever a land you control enters, creatures you control get +1/+1 until end of turn.

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.)

Once each turn, when you activate a nonmana ability, you may gain 1 life and draw a card.
{2}{W}{U}: You may tap or untap target creature or artifact.