When Night Squad enters, teach target creature menace. If you put a +1/+1 counter on it this way, it can't be blocked this turn.

Level up {1}{B}
[level 1-2] When this creature dies, put its counters on another target creature you control with level up.
[level 3+] When this creature dies, put its counters on each creature you control with level up.

Whenever your Champion attacks, Xarr's Mockery gains indestructible until end of turn.

At the beginning of your upkeep, create a Treasure token.
Whenever you sacrifice an artifact or enchantment, this creature deals 1 damage to each opponent.

Menace
Whenever Corporate Mentor attacks, teach target attacking creature with lesser power menace.

Corrupt — When this creature enters, if you control a permanent with greater mana value, it deals 1 damage to any target.

Whenever you sacrifice a nonland permanent, each opponent sacrifices a permanent that shares a card type with it.
{3}, {T}, Sacrifice another creature: Gatherer of Grievances deals damage equal to the sacrificed creature's power to target player. Activate only as a sorcery.

Whenever this creature deals combat damage to a player or planeswalker, put a +1/+1 counter on it.

Deathtouch
Once during each of your turns, when you sacrifice a nontoken, nonland permanent, you may create a tapped token that's a copy of it.

{T}: Add {C}.
Spellcharge 4

Flying, lifelink
{2}{W}: Untap each creature you've activated this turn. They get +1/+1 and gain lifelink until end of turn. Activate only once each turn.

Flying
Amity — Whenever you attack with Warden of Soul and exactly one other creature, search your library for a legendary or Dragon card, reveal it, put it into your hand, then shuffle.

When Lady of the Mists enters, you may pay 2 life. If you do, it acclimates.
As long as you control a Weather, Lady of the Mists gets +0/+2.

Whenever this creature transforms into Lone Switchblade or another permanent you control transforms, each opponent loses 1 life and you gain 1 life.

Deathtouch
When Phyto's Offshoot enters, you may exile any number of permanent cards from your graveyard. When you do, target opponent reveals that many cards from their hand. You choose one of them. That player discards that card.

When Widowed Maiden enters, return target creature card from your graveyard to your hand.
Spellcharge 3

This spell costs {1} less to cast for each creature you control.
Trample
When this creature enters, you may discard a card. If you do, draw two cards.

{2}, Sacrifice a creature: Teach target creature menace.

If you would create one or more artifact tokens, instead create those tokens plus an additional Treasure token.
{2}{R}, Sacrifice X artifacts: This creature gets +X/+0 until end of turn.

Landfall — Whenever a land you control enters, Eerie Sculpture deals 1 damage to target player or planeswalker.

Flying
Whenever you cast a spell from exile, this creature deals damage equal to that spell's mana value to any target.

Approval — When Inflammatory Declaimer enters, it deals X damage to each opponent, where X is the number of colors among permanents you control.

Trample
Whenever Iron Steambreaker attacks, put a +1/+1 counter on it.

Flying, haste
Amity — Whenever you attack with Warden of Heart and exactly one other creature, you may put a legendary or Dragon card from your hand onto the battlefield tapped and attacking.

Revered
Whenever this creature attacks, create a tapped and attacking token that's a copy of it. For each counter on this creature, put a counter of that kind on that token. Sacrifice the token at the end of combat.