msem-instigator

Choose one —
• Target creature gets +1/+1 and gains hexproof until end of turn.
• Target creature gets -4/-0 until end of turn.
• Scry 1, then draw a card.

When Scrapgear Contraption dies, you may put a +1/+1 counter on target creature.

First strike
When Soulstone Commander enters, return target Soldier creature card from your graveyard to the battlefield. That creature is a Spirit in addition to its other types.

[+1]: Each opponent puts a -1/-1 counter on a creature they control.
[–1]: Exile target card in a graveyard. You gain life equal to its mana value.
[–6]: Choose a number. You draw that many cards and you lose that much life.

At the beginning of each end step, if a creature died this turn, you may put a +1/+1 counter on target creature you control.

Whenever Bold Vanquisher attacks, upgrade it. (Give it one of the listed counters it doesn't already have.)
• +1/+1
• Trample

Harness (You may tap a creature you control as you cast this spell. If you do, reduce this spell's mana cost by that creature's power.)
Overheat deals X damage to any target.

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.)
Once each turn, when a Curse you control becomes attached to an opponent, you may sacrifice it. If you do, reveal cards from the top of your library until you reveal a Curse card. Put that card onto the battlefield attached to that player, and the rest on the bottom of your library in a random order.

Reach (This creature can block creatures with flying.)

Flying
When Curator of Curios enters, draw a card for each glory counter you have.

Nonland permanents have “This permanent doesn't untap during your untap step” and “{2}: Untap this permanent.”

Exile target artifact or creature you control, then return that card to the battlefield under its owner's control. Create a 1/1 white Spirit creature token with flying.
Flashback {2}{W} (You may cast this card from your graveyard for its flashback cost. Then exile it.)

Target creature you control gets +X/+X until end of turn, where X is the number of +1/+1 counters among creatures you control.

Destroy target creature that's not enchanted and isn't an enchantment.

At the beginning of your upkeep, put a loyalty counter on each planeswalker you control.
[0]: Tap target creature.
[–1]: Untap target basic land.
[–7]: Draw up to six cards.

Flying
Death knell — Skullhoarder Dragon gets +2/+0 until end of turn. (As a creature you control dies, trigger one death knell of that creature or another permanent you control.)

Sunspear Surge deals 2 damage to target creature and 1 damage to each other creature.

Create a 2/2 black Horror creature token.
Compose (Then if you cast this from your hand, exile it and create a Saga token with “r3—You may cast a copy of this card from exile without paying its mana cost.”)

Art of war — At the beginning of your end step, if Kuryu Swordsman dealt damage to an opponent this turn, you may have Kuryu Swordsman fight target creature you don't control. (Each deals damage equal to its power to the other.)

Vanguard — Whenever a creature you control attacks alone, draw a card.

{T}: Add one mana of any color.
Paranoia {G} (You may cast this spell for its paranoia cost when a permanent you control leaves the battlefield.)

Thornwood Falls enters tapped.
When Thornwood Falls enters, you gain 1 life.
{T}: Add {G} or {U}.

Flying
Whenever Cyrukan Weaponmaster attacks, amass Soldiers 1. (Put a +1/+1 counter on an Army you control. It's also a Soldier. If you don't control one, create an 0/0 black Soldier Army creature token first.)

Lifelink
Converge — When Adapted Explorer enters, it deals X damage to up to one target tapped creature, where X is the number of colors of mana spent to cast it.

Enchant creature you control
When Brawnsurge enters, enchanted creature deals damage equal to its power to up to one target creature an opponent controls.
Enchanted creature gets +1/+1 and has trample.