msem-instigator

Battalion — Whenever Callous Trainer and at least two other creatures attack, create a 1/1 white Warrior creature token that's tapped and attacking.

Enchant creature
Enchanted creature can't attack or block.
{2}{U}: Return Whiplash and enchanted creature to their owners' hands.

Choose one —
• Creatures you control get +2/+0 until end of turn.
• Destroy target artifact or enchantment. You gain 3 life.

Target creature can't block this turn. (Then exile this card. You may cast the creature later from exile.)

Concord — When Palace Servant enters, if there are four or more card types among permanents you control, create two 1/1 white Merfolk creature tokens.

When Seafloor Tomb enters and when you sacrifice it, exile up to two target cards from graveyards.
{1}{B}, Sacrifice Seafloor Tomb: Draw a card.
Cycling {2} ({2}, Discard this card: Draw a card.)

At the beginning of your end step, draw a card if a creature died this turn. Then Tumultipede deals 2 damage to each opponent if two or more creatures died this turn. Then create three 1/1 green Saproling creature tokens if three or more creatures died this turn.

When Kiri Yoroi enters, create a 2/2 colorless Spirit creature token and attach Kiri Yoroi to it.
Equipped creatures you control get +1/+1.
Equip {2}

{T}, Pay 1 life: Add {B}.
{T}, Pay 1 life, Sacrifice Murky Peat: Search your library for a Swamp card, put it onto the battlefield tapped, then shuffle.

Whenever Essence Carver blocks or becomes blocked by a creature with toughness 4 or greater, Essence Carver gets +2/+2 until end of turn.

Search your library for a creature card with haste, one with reach, one with trample, and one with vigilance, each with different names and reveal them. An opponent chooses two of those cards. Put the chosen cards into your graveyard and the rest into your hand. Then shuffle.

Enchant creature
Enchanted creature gets +2/+2. Other creatures you control get +1/+1.

Voracious 2 (As this enters, you may sacrifice up to two artifacts and/or creatures. This creature enters with that many +1/+1 counters on it.)
Each creature you control with a +1/+1 counter on it has trample.

When Goldhill Guardian enters, choose a creature type.
Goldhill Guardian has protection from creatures of the chosen type. (It can't be blocked, targeted or dealt damage by creatures of the chosen type.)

Indestructible
Battalion — Whenever Rallios, Heir to the Evil One and at least two other creatures attack, creatures you control get +1/+0 and gain double strike until end of turn.

Target opponent reveals their hand. You choose a nonland card from it. Exile that card. You lose 2 life.
Augmented — Then if you've spent {W}{U}{B}{R}{G} to cast spells this turn, you may cast that card without paying its mana cost.

Invocation — Whenever you spend four or more mana to cast a spell or activate an ability during your turn, create a 2/2 green Wolf creature token.
{4}{G}{G}{G}: Other creatures you control get +3/+3 and gain haste until end of turn.

Exile target permanent you control, then return that card to the battlefield under your control.

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

Return target creature card from a graveyard to the battlefield. Then if that card wasn't put into a graveyard from the battlefield this turn, exile it.

Deception can't be blocked.
{1}{U}{B}: Target creature can't be blocked this turn. Activate only if Deception is in your graveyard.

Exile any number of target creatures and/or planeswalkers you control. You gain 1 life for each card exiled this way, then return them to the battlefield under your control.

Bleed {B/R} (You may cast this spell for its bleed cost if an opponent has lost life this turn.)
Left for Carrion deals 4 damage to target creature.

Menace
When The Anguilahydra enters, draw X cards and put X +1/+1 counters on The Anguilahydra, where X is the number of enchantments you control.