msem-instigator

Haste
When Bloodfury Warlord enters or dies, it deals 2 damage to each player.

When Callous Renegade enters, you may return target Rebel creature card with mana value 4 or less from your graveyard to the battlefield. It gains haste until end of turn.

[+1]: You gain 1 life for each creature card in your graveyard.
[–4]: Exile another target nonland permanent.
[–X]: Return target permanent card with mana value X or less from your graveyard to the battlefield.

Flying (This creature can't be blocked except by creatures with flying or reach.)
Whenever Glintfeather Sage or another creature with flying you control dies, you may pay {1}. If you do, draw a card.

When Goriana Earthshaker enters, you may untap target land you control. It becomes a 3/3 Elemental creature with haste until end of turn. It's still a land.

[+1]: Create a 1/1 colorless Thopter artifact creature token with flying. It gains lifelink until your next turn.
[–1]: Sacrifice an artifact. If you do, draw two cards.
[–6]: Draw seven cards. Artifact spells you cast this turn cost {2} less to cast.

Motivate 2 (When this creature enters, you may motivate target creature with less power than this by putting two +1/+1 counters on it.)
Whenever a creature you control becomes motivated, you gain 2 life.

[+1]: The next instant or sorcery spell you cast this turn costs {1} less to cast.
[–4]: Until end of turn, whenever you cast an instant or sorcery spell, Merkurio deals 2 damage to any target.
[–8]: Exile the top seven cards of your library. You may cast any number of instant and sorcery cards from among them without paying their mana costs.

Kicker {2} (You may pay an additional {2} as you cast this spell.)
Prowess
When Merkurio's Opus enters, if it was kicked, draw two cards, then discard two cards.

Artifact spells you cast cost {1} less to cast.
{2}, Sacrifice an artifact: Target creature gains deathtouch until end of turn.

Whenever you cast a spell during an opponent's turn, put a +1/+1 counter on Oracle of Tides.

Lifelink
When Runic Soulthief enters, target player loses X life and you gain X life, where X is the number of enchantments you control.

Trample (This creature can deal excess combat damage to the player or planeswalker it's attacking.)
Whenever Centipede Engine attacks, you may have target creature block it this turn if able.

When Crystalline Golem enters, choose a color. You gain 1 life for each permanent of that color you control.

{T}, Sacrifice Escape Hatch: Return target creature you control to its owner's hand.

Equipped creature gets +1/+1 and has “{5}, {T}: This creature fights another target creature.”
Equip {5} ({5}: Attach to target creature you control. Equip only as a sorcery.)

{3}, Sacrifice another artifact: Put two +1/+1 counters on Foundryborn Ingester.
When Foundryborn Ingester dies, you may exile it. If you do, return target artifact card from your graveyard to your hand.

Tap another untapped artifact you control: Until end of turn, Glitched Carcass becomes an X/X Construct artifact creature, where X is the mana value of the tapped artifact. Activate only once each turn.

Equipped creature has “{2}, {T}: This creature deals 1 damage to any target.”
{4}: Untap equipped creature.
Equip {3}

Equipped creature gets +1/+2.
Equip {2} ({2}: Attach to target creature you control. Equip only as a sorcery.)

Whenever Knowledge Extractor deals combat damage to a player, draw a card.

Indestructible (Damage and effects that say “destroy” don't destroy this creature.)

Whenever another artifact you control enters, put a +1/+1 counter on Metalwork Machinist.

Equipped creature has all activated abilities of all creature cards in your graveyard.
Equip {3}

{2}, {T}, Exile a card from your graveyard: Draw a card.