msem-instigator

{T}: Target creature you control gets +1/+1 until end of turn. Activate only as a sorcery.
Scavenge {W} ({W}, Exile this card from your graveyard: Put a number of +1/+1 counters equal to this card's power on target creature. Scavenge only as a sorcery.)

Until your next turn, target creature can't attack or block.
Fabled {1}{W} (Then if you cast this for its fabled cost, put it onto the battlefield transformed attached to that creature.)

I, II — Scry 1. You get a research counter.
III, Discovery — Eureka! (At the beginning of each end step, you get a research counter if you cast a spell this turn. Then if you have eight or more research counters, remove them all and create a Masterpiece token of your choice.)

Exile up to three target cards from a single graveyard.
Lifecycle {3} ({3}, Discard this card: Create two tapped 1/1 colorless Elemental creature tokens.)

Enchant opponent
Whenever Substack Exploit or another Curse becomes attached to enchanted player, that player loses 1 life and you gain 1 life.

Breach (Whenever this deals combat damage to a player, you may have it become an Aura Curse until your next turn. Attach it to that player.)
At the beginning of your end step, Substack Sniper deals 1 damage to you and to each cursed opponent.

Target creature can't block this turn.
Inscribe {1}{R} ({1}{R}: Exile this card from your hand inscribed on a creature you control. Whenever that creature attacks, its controller may cast a copy of the inscribed card without paying its mana cost. Inscribe only as a sorcery.)

Prowess
Disgraced 2 (This enters with two -1/-1 counters. Whenever it deals combat damage to a player, remove all -1/-1 counters from it.)

At the beginning of your upkeep, Suitor of the Sea deals 1 damage to each player.

Pay 2 life, Sacrifice a Clue: Draw a card.

As an additional cost to cast this spell, discard a card.
Draw two cards unless any opponent discards two cards.

Return target nonland permanent to its owner's hand.
Reconstruct {5}{U} (You may cast this from your graveyard for its reconstruct cost reduced by the mana value of a permanent you sacrifice as you cast it this way. Then exile this.)

Return target creature to its owner's hand. Its controller loses 1 life.

Heretic (Whenever you cast a spell that doesn't share a color with this creature, it gets +1/+1 until end of turn.)
{1}{W}: You gain life equal to Sunken Outcast's power.

Lifelink
When Sunlight Dancer enters, target opponent gains 4 life.

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

Flying (This creature can't be blocked except by creatures with flying or reach.)

Sunwing has flying as long as it's your turn.

Target creature gets +2/+0 until end of turn and gains “When this creature dies, return it to the battlefield tapped under its owner's control.”

Equipped creature has vigilance and “{T}: Add one mana of any color.”
Equip {1}

When Suraj Militant enters, target creature gets +1/+1 until end of turn.

Target creature gets +X/+X until end of turn.
Fabled {X}{R}{R} (Then if you cast this for its fabled cost, put it onto the battlefield transformed attached to that creature.)

Surging Lightning deals 2 damage to target creature or planeswalker. If you've cast another spell this turn, it deals 4 damage instead.

Until end of turn, target creature gets +1/+1 and gains lifelink.

Regenerate target creature. (The next time that permanent would be destroyed this turn, it isn't. Instead tap it.)