msem-instigator

Whenever Eternal Scout attacks, untap each other creature you control.

Hexproof
Whenever one or more cards are put into your graveyard from anywhere, Creeping Hidebehind gets +1/+0 until end of turn.

Create two 1/1 green Elf Scout creature tokens. They gain reach until end of turn.

Reach
Hexproof (This creature can't be the target of spells or abilities your opponents control.)

Target creature gets +1/+1 until end of turn for each card in your graveyard.

{G}, {T}: Put a +1/+1 counter on Bloodleaf Tracker for each creature that entered this turn.

{T}: Choose a color of a card in your graveyard. Add one mana of that color.

Vision (Whenever this or another creature you control enters, reveal the top card of your library. Then you may put that card into your graveyard.)
Whenever Aether Recoverer envisions a creature card, return target noncreature card from your graveyard to your hand.

Whenever one or more creatures you control attack, you may post a bounty on target creature. (Put a bounty counter on that creature. It has “When this creature dies, each opponent draws a card” as long as it has a bounty counter on it.)

Prowess
Whenever you cast a noncreature spell, target creature can't block this turn.

Whenever a nonland permanent enters under an opponent's control this turn, gain control of that permanent until the end of your next turn. It gains haste until end of turn.

Untap target creature and gain control of it until end of turn. That creature gains haste until end of turn.

Flying, first strike
Whenever Terror of Sunset Cliffs attacks, each player discards their hand and draws seven cards.
Whenever an opponent discards a card, Terror of Sunset Cliffs deals 1 damage to that player.

Whenever a creature or planeswalker enters, its controller may have it deal damage equal to its power or loyalty to any target of that player's choice.

When Sunset Cliffs Lawman enters, you may post a bounty on target creature. (Put a bounty counter on that creature. It has “When this creature dies, each opponent draws a card” as long as it has a bounty counter on it.)

Sunset Cliffs Hunter gets +1/+0 and has first strike as long as a player controls a permanent with a bounty counter on it.

Choose two —
• Gain control of target artifact until end of turn. Untap it. It gains haste until end of turn.
• Create a Gold token. (It's an artifact with “Sacrifice this artifact: Add one mana of any color.”)
• Create a Clue token. (It's an artifact with “{2}, Sacrifice this artifact: Draw a card.”)

Prowess
Whenever you cast a noncreature spell, you may pay {R}. If you do, post a bounty on target creature. (Put a bounty counter on that creature. It has “When this creature dies, each opponent draws a card” as long as it has a bounty counter on it.)

{R}, {T}: Sandbluff Slinger deals 1 damage to any target.
Quickdraw {1}{R} (When a creature you control blocks or becomes blocked, you may cast this spell for {1}{R}.)

First strike
Spells you cast during combat cost {1} less to cast.

When Sandbluff Assailant enters, it deals 1 damage to target player or planeswalker.

Destroy up to one target artifact. Create a Gold token. (It's an artifact with “Sacrifice this artifact: Add one mana of any color.”)

Rain of Blood deals 3 damage to each creature and each player.

Trample

Haste
When Qilan Stormers enters, it gets +X/+0 until end of turn, where X is the number of creatures you control.