msem-instigator

When this permanent transforms into Worthy Vulpine or at the beginning of combat on your turn, creatures you control gain haste and trample until end of turn.

Legacy (You may play this side of this card only from your graveyard. Exile it if it would be put into a graveyard or not resolve.)
For each of up to two target creatures you control, put a +1/+1 counter on it, then you may have it deal damage equal to its power to any target.

Haste
When Wretched Merfolk enters, target creature can't block this turn.

Trample
Whenever Wun Su, Guru of the Staff deals combat to a player, you may create Wun Su's Staff, a legendary colorless Equipment artifact token with “Equipped creature gets +5/+5” and equip {5}, then attach it to Wun Su.

As an additional cost to cast this spell, sacrifice a land.
Create a 6/6 red Wurm creature token with “This creature can't be blocked by creatures with flying.”

Wyrmfire deals 3 damage to target creature or planeswalker. Excess damage is dealt to that permanent's controller instead.

Choose one —
• Copy target instant, sorcery, or Equipment spell you control. You may choose new targets for the copy.
• Create a token that's a copy of target Equipment you control.

Transcend (Activate as a sorcery to gain the next type and a +1/+1 counter.)
Trample
{2}{R}: Demigod — Create a 2/1 black Spirit creature token with “This creature can't block.”
{5}{R}: God — Until end of turn, creatures you control get +1/+0 and gain haste and “When this creature dies, it deals 1 damage to any target.”

At the beginning of combat on your turn, you may pay {2}{R}{R}. If you do, create a 4/4 red Dragon creature token with flying and haste. Exile that token at end of combat.
Ferocious — Whenever Xiusheng of the Dragon Realm attacks, if you control a creature with power 4 or greater, Xiusheng gains double strike until end of turn.

Enchant creature
{R}: Enchanted creature gets +1/+0 until end of turn.
Ferocious — Whenever enchanted creature attacks, if you control a creature with power 4 or greater, enchanted creature gains double strike until end of turn.

{R}: Xiyue Dragondancer gets +1/+0 until end of turn.
Whenever you cycle Xiyue Dragondancer or it attacks, create a Treasure token.
Basic landcycling {1}{R} ({1}{R}, Discard this card: Search your library for a basic land card, reveal it, and put it into your hand, then shuffle.)

Whenever one or more creatures you control deal combat damage to a player or planeswalker, put a +1/+1 counter on target creature you control.

When Yamisaran Bladedancer enters, you may attach an Equipment you control to target creature you control.

When Yamisaran Guard enters, create a colorless Equipment artifact token with “Equipped creature gets +1/+1” and equip {1}.

Reach
{T}: Yangzhi Cloudpiercer deals 1 damage to target player or planeswalker.

Young Dragonheart gets +1/+0 and has first strike as long as you control a legendary creature.

Double strike, haste

Other Rebel creatures you control get +1/+0.
When Youthful Renegade enters, create a 1/1 white Rebel creature token.

Flying
Erratic (When this creature dies, reveal the top four cards of your library. Put a creature card that costs less than this revealed this way onto the battlefield and the rest on the bottom of your library in any order.)
Whenever Zaidha, Seraph of Calamity deals combat damage to a player, choose up to two target nonland permanents that player controls and target nonland permanent you control. Destroy one of those permanents at random.

Whenever Zana, the Dreamer attacks, you may pay {3}{R}{R}. If you do, for each attacking nontoken creature you control, create a tapped and attacking token that's a copy of it, except the tokens aren't legendary. Exile those tokens at the beginning of the end step.

{1}{R}, {T}, Sacrifice a land: Create a colorless Desert land token with “{T}: Add {C}.”
{1}{R}, {T}, Sacrifice a Desert: Destroy up to two target lands.

Other creatures you control get +3/+0.
When Zare enters, create a 2/1 white Bird creature token with flying and a 3/3 green Horse creature token.
Whenever another creature you control attacks or blocks, sacrifice it at end of combat.

Trample
Prowess (Whenever you cast a noncreature spell, this creature gets +1/+1 until end of turn.)

Whenever two or more creatures an opponent controls block, adjudicate. (Create a white Aura enchantment token with enchant creature and “Sacrifice this token: Untap enchanted creature” attached to target creature.)
Enchanted creatures you control have menace.

Whenever Zealous Scaleblight becomes tapped, it deals 1 damage to any target.