msem-instigator

Enchantment spells you cast cost {1} 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.)
{1}{W}: Target creature with a +1/+1 counter on it gains lifelink until end of turn.

{T}: Add {C}.
{T}, Sacrifice Shiftscape Canyon: Choose a basic land type other than Plains. Create a colorless land token that's a Plains and the chosen basic land type. Activate only during your upkeep.

Flying

Put target permanent on top of its owner's library.

At the beginning of your upkeep, exile the top card of your library. Until end of turn, you may play that card if it's an instant or sorcery card.

Target creature phases out. (Treat it and anything attached to it as though they don't exist until its controller's next turn.)

Equipped creature gets +2/+2 and has vigilance.
Equip {4}
Wanderlust — Wayfarer's Adornments has equip {0} as long as you control four or more differently named lands.

Counter target spell unless its controller pays {1} for each card in their graveyard.

Whenever Shianne's Guardian or another creature you control enters, you may pay {1}{R}{G}. When you do, that creature deals damage equal to its power to any target.

Target creature gets +X/+0 and gains trample until end of turn.

This spell costs {1} less to cast for each artifact you control.
Draw two cards.

Menace, haste
At the beginning of combat on your turn, gain control of up to two target noncreature, nonland permanents your opponents control until end of turn. Untap those permanents. You may attach any number of Equipment among them to creatures you control until end of turn. (They unattach at end of turn.)

Enchant creature
When Ethereal Fervor enters, adjudicate. (Create a white Aura enchantment token with enchant creature and “Sacrifice this token: Untap enchanted creature” attached to target creature.)
Enchanted creature gets +1/+0 for each Aura attached to it, has first strike, and attacks each combat if able.

This spell costs {1} less to cast for each creature type among creature cards in your graveyard.
Deathtouch
{1}{B}, Exile any number of creature cards from your graveyard with five or more different creature types among them: Search your library for a card, put it into your hand, then shuffle. Activate only as a sorcery.

Wu Xing (Add effects based on the number of colors of mana spent to cast this spell.)
1 | Mill five cards. An opponent separates the milled cards into two piles. Put one pile into your hand.
5 | You may cast a nonland card from the other pile without paying its mana cost.

Destroy target creature with power or toughness 2 or less.

Enchant player
Whenever enchanted player casts a spell from anywhere other than exile, exile that spell. During that player's next turn, they may cast that card without paying its mana cost.

Lightwalker has flying as long as it has a +1/+1 counter on it.

Draw a card, then draw cards equal to the number of cards named Sea Cache in your graveyard.

Each creature you control gets +1/+1 for each other creature you control with the same name.

When Haughty Paladin enters, you may sacrifice another artifact or creature. If you do, tap all creatures your opponents control.

Draw two cards, then discard a card.
Whenever you cast an instant or sorcery spell, if Spirit Script is in your graveyard, you may have it become a copy of that spell until end of turn.

Takumi's Headquarters enters tapped.
When Takumi's Headquarters enters, you may mill two cards.
{T}: Add {W} or {U}.

If an ability of a creature or planeswalker an opponent controls was activated this turn, you may pay {1}{B} rather than pay Spike Wall Trap's mana cost.
Destroy target creature or planeswalker.