msem-instigator

Trample
When Shigurei, the Floodbringer enters, up to three target permanents become colorless Island lands.

Flash
Flying
When Meletis Stratomancer enters, target creature an opponent controls gets -2/-0 until end of turn.

When Severed Hands enters, surveil 2.
Whenever one or more cards leave your graveyard, tap target creature an opponent controls and put a stun counter on it. (If a permanent with a stun counter would become untapped, remove one from it instead.)

Target player gets a poison counter.
Draw a card.

Equipped creature gets +2/+2.
Whenever equipped creature deals combat damage to a player, you may put a permanent card with mana value 2 or less from your hand onto the battlefield.
Equip {2}

Search your library for two basic land cards and put them onto the battlefield tapped. Then they become 0/1 green Plant creatures with “This creature can't block” in addition to their other colors, types, and abilities.

Whenever Gifted Warmage attacks, upgrade it. (Give it one of the listed counters it doesn't already have.)
• +1/+1
• Flying

At the beginning of each combat, you may have Firefish Conjurer deal 3 damage to target creature you control. If you do, Firefish Conjurer gets +2/+0 and gains flying until end of turn.

When Keeper of the Ancient Ways enters, destroy up to three target noncreature, nonland artifacts and/or enchantments with total mana value 3 or less.

When Barricade Patrol enters, create a 1/1 white Human Soldier creature token.
Whenever another creature you control dies, Barricade Patrol deals 1 damage to target player.

At the beginning of your upkeep, if six or more cards are in your graveyard, you may transform Scuttling Gnat.

Deathtouch
When Bitterheart Bokor leaves the battlefield, you may search your library for a Curse card, reveal it, put it into your hand, then shuffle.

{T}: Izahl, the Stormbringer deals 1 damage to any target.
Whenever you cast a noncreature spell, you may untap target creature you control.

{W}: Target creature assigns combat damage equal to its toughness rather than its power this turn.

Whenever Sower of Sabne's Harvest enters or attacks, align X, where X is your fealty to Forests. (Choose modes with total ★ less than or equal to the number of Forests you control. You may choose modes multiple times.)
• ★★ — Put a +1/+1 counter on target creature.
• ★★★ — Exile target artifact or enchantment.
• ★★★★★ — You gain 5 life.

Enchant player
At the beginning of enchanted player's upkeep, if that player has one or fewer cards in hand, they lose 3 life.

Target opponent loses 2 life and you gain 2 life. If you control a Wizard, instead that player loses 4 life and you gain 4 life.

Enchant creature
Enchanted creature has vigilance.
Whenever enchanted creature attacks or blocks, you gain 2 life.

Flash
Enchant creature
Enchanted creature gets -3/-0 and doesn't untap during its controller's untap step.

Whenever you cast a black spell, choose up to X, where X is the number of black mana symbols in that spell's mana cost —
• Target player loses 1 life and you gain 1 life.
• Put a -1/-1 counter on target creature.
• You draw a card and you lose 3 life.
• Exile target card in a graveyard.

Vigilance
When this creature enters, create a 1/1 blue Bird creature token with flying.

You may cast Oil the Mind from your graveyard.
Target player mills three cards.
If Oil the Mind was cast from your graveyard, conjure a card named Fatigue and put it on top of your library. (It's a colorless sorcery that costs {2} with “Draw a card.”)

Equipped creature gets +1/+0 and has menace.
Equip {3}

Breach (Whenever this deals combat damage to a player, you may have it become an Aura Curse until your next turn. Attach it to that player.)
At the beginning of your end step, each cursed opponent loses 2 life unless they discard a card.

Flying
Whenever another creature you control enters, you gain 1 life.