msem-instigator

Target creature you control gets +X/+X until end of turn. It fights target creature you don't control.

Put a +1/+1 counter on target creature you control. Then that creature fights target creature you don't control. (Each deals damage equal to its power to the other.)

When Hunter's Arsenal enters, create a Weapon token. (It's an Equipment artifact with “Equipped creature gets +1/+1” and equip {2}.)
{1}, {T}, Sacrifice Hunter's Arsenal: Search your library for a basic land card, reveal it, put it into your hand, then shuffle. You gain 2 life.

Enchant creature
As Hunter's Distinction enters, you may tap enchanted creature if it's untapped. When you do, put three -1/-1 counters on target creature with flying.
Enchanted creature gets +3/+2 and has reach.

{1}{G}{G}, Discard a card: Destroy target artifact or enchantment.
At the beginning of your end step, if twelve or more cards are in your graveyard, create two 3/3 green Beast creature tokens.

Scry 3, then reveal the top card of your library. If it's a creature card, Hunter's Instinct deals damage to target creature equal to the revealed card's power.
Ferocious — If the revealed card is a creature card with power 4 or greater, put it into your hand.

Enchant opponent
Spells you cast that target enchanted player cost {2} less to cast.

Wanderlust — When you cast this spell, you may copy it if you control four or more differently named lands. You may choose new targets for the copy.
Search your library for a creature or land card, reveal it, put it into your hand, then shuffle.

When Hunting Ground enters, create four 1/1 green Saproling creature tokens.
Whenever a creature you control dies, creatures you control get +1/+1 until end of turn.

Enchant creature
Enchanted creature has “{T}: This creature deals 1 damage to any target. If this is the second time this ability has resolved this turn, it deals 5 damage to that target instead.”

Huolin Shrine enters tapped.
{T}: Add {R} or {W}.
{R/W}, {T}, Sacrifice Huolin Shrine: Put a +1/+1 counter on target creature you control. Activate only as a sorcery.

Glitch {2} (Remove one [restriction] for each time you pay the glitch cost.)
Return target creature [you control] to its owner's hand.
Draw a card.

[+1]: Prevent all damage that would be dealt to up to one other target permanent until your next turn.
[–2]: Target creature gets +3/+3 until your next turn.
[–3]: Untap all nonland permanents you control.

Target creature you control becomes a white Bear with base power and toughness 3/5, hexproof, and double strike until end of turn. Whenever it deals combat damage to a player this turn, draw a card.

Archive 6 (As this enters, shuffle the top six cards of your main library into a new face up library. Sacrifice this after the archived library is empty.)
You may play Aura and Equipment cards from the archived library, and play those spells as though they had flash.

I, II — Create a 3/3 green Beast creature token with defender.
Discovery — Creatures you control with defender can attack as though they didn't have defender.

Counter target spell. If that spell is countered this way, its owner puts it on the top or bottom of their library instead of into their graveyard.
Each player draws a card.

Equipped creature gets +1/+1 for each permanent attached to it.
Permanents attached to equipped creature have ward {3}.
Equip {1}

Hymn of Fury deals 1 damage to each creature, then each creature you control gains haste and double strike until end of turn.

Double the power and toughness of target creature you control until end of turn. It doesn't untap during its controller's next untap step.

Tap up to two target creatures. Those creatures don't untap during their controller's next untap step.

Enchant creature
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.)
Enchanted creature doesn't untap during its controller's untap step.

Enchant creature
When Hypnotic Halo enters, create an Idol token. (It's an artifact with “{1}, Sacrifice this artifact: Put a +1/+1 counter on target creature. Activate only as a sorcery.”)
{2}{W}{W}, Sacrifice Hypnotic Halo: Exile enchanted creature.

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.)
Search target opponent's library for a creature or planeswalker card and put it onto the battlefield under your control. That player shuffles.

Exile all creature cards from target player's graveyard. For each creature card exiled this way, search that player's library for any number of cards with the same name as that card and exile them. Then that player shuffles.