msem-instigator

Exile target nonland permanent. 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.”)

Whenever Hero's Henchman attacks, another target creature you control gets +1/+1 until end of turn.

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.

When Strength of the Patient enters, if it was revived, put four +1/+1 counters on it.
Revive {4}{W}{W}{W} ({4}{W}{W}{W}, Exile this card from your graveyard: Create a token that's a copy of it except it has no mana cost. Revive only as a sorcery.)

Flying
Whenever you cast a noncreature spell, note its mana value.
When Strix of Dark Omens dies, draw a card and create a 1/1 blue Bird creature token with flying for each different number noted with it.

Enchant creature
When this enchantment enters, surveil 2.
Enchanted creature gets +2/+2 and has lifelink.

This spell costs {X} less to cast, where X is the number of card types among cards in your graveyard.
Surveil 3, then you draw three cards. You lose 3 life.

L.O.T.U.S. enters tapped.
When L.O.T.U.S. enters, conjure three cards named Data-Point into your hand. (It's a sorcery that costs {2} with “Draw a card.”)
{T}: Add three mana of any one color.

Flying
When Illuminating Archangel enters, target creature gets +X/+X and gains vigilance and first strike until end of turn, where X is the number of permanents you control that are Angels, Demons, Faeries, and/or Spirits.

Echoing Thunder deals 3 damage to target creature and all other creatures with the same name as that creature.

Hexproof
Cycling {3} ({3}, Discard this card: Draw a card.)

Flash
If an opponent would draw a card, that player exiles the top card of their library instead. During each player's turn, that player may play that card for as long as it remains exiled.

Dreamchaser Djinni attacks each combat if able.

Draw a card. If this is the third spell you've cast this turn, create a 2/2 blue Drake creature token with flying. If this is the sixth spell you've cast this turn, exile it, then return up to three target instant and/or sorcery cards from your graveyard to your hand and untap up to six lands.

When Naiad of the Glen 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.”)
Naiad of the Glen has trample as long as it has a +1/+1 counter on it.

Creatures you control get +1/+1 for each color among permanents you control.

As an additional cost to cast this spell, discard your hand.
Purge four times, then you gain 1 life for each card in exile. (Exile two cards that share a type from graveyards. If you do, draw a card.)

Target attacking creature gets +3/+1 and gains trample until end of turn. (Then exile this card. You may cast the creature later from exile.)

Counter target creature spell.

Once each turn, when a creature card is put into your graveyard from anywhere, create a 1/1 blue and black Bird creature token with flying and “When this creature deals combat damage to a player, sacrifice it. If you do, draw a card.”
Whenever three or more creatures you control deal combat damage to a player, that player loses 1 life for each card in your hand.

When Forlorn Murklurker dies, submerge the top card of your library. (To submerge a card, exile it, then put it on the battlefield face down under its owner's control as a 2/2 creature.)

Counter target spell unless its controller pays {3}. Its controller mills three cards.

Flash

Flying
Whenever an embattled creature you control attacks, tap target creature defending player controls. (A creature is embattled if it has a counter on it or has a permanent you control attached to it.)