msem-instigator

Target creature you control gains indestructible until end of turn. If that creature is a Scout, you gain 1 life for each land you control.

Other creatures you control named Starfall Dancer get +2/+2.

Shimmer (Whenever this creature attacks, create a tapped and attacking token that's a copy of it. Exile the token at the beginning of the end step.)
Each other creature you control gets +1/+1 for each creature you control with the same name as it. (A token's name is its creature types unless specified.)

Equipped creature gets +5/+5.
Whenever equipped creature becomes blocked, destroy all other creatures.
Equip {5}

Whenever Stargaze Spirit or another creature dies, you may gain 1 life.
Revive {3}{W} ({3}{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.)

You gain 4 life. Then if {R} was spent to cast Starglare, it deals 4 damage to up to one target creature.

You may exile cards you own as you reveal them. (You see the card before you exile it.)
During each of your turns, you may cast a card exiled with Starwing Nebula.

Whenever Stealer of Secrets deals combat damage to a player, draw a card.

Flying
Whenever a player shuffles their library, Steamquiver Strix deals 2 damage to that player.

Prowess
Whenever Steamwalker attacks, you may discard a card. If you do, draw a card, then catalyze. (The next spell you cast this turn costs {1} less to cast.)

Whenever Steward of Silence blocks, you get a glory counter. (You lose glory counters before life. A player with ten or more glory counters wins the game.)

Target opponent discards a card at random. If that card's mana value is 3 or less, you may cast it without paying its mana cost.

Whenever you cast a spell that doesn't share a color with Stinging Hunter, each opponent loses 1 life.

Until end of turn, gain control of target artifact or land and it gains haste. Untap it.
Create a Gold token. (It's an artifact with “Sacrifice this artifact: Add one mana of any color.”)

{1}, {T}, Sacrifice Stolen Strain: Target creature gains lifelink until end of tun.
{1}, {T}, Sacrifice Stolen Strain: Target creature gains winnow until end of turn. (Damage dealt to it also causes its controller to lose that much life.)

Haste
Storm Entity enters the battlefield with a +1/+1 counter on it for each other spell cast this turn.

Whenever a permanent you control becomes tapped, Storm Servant gets +1/+1 until end of turn.

Flying, haste
Whenever you cast an instant or sorcery spell, create a token that's a copy of Stormcall Thunderbird.

Whenever equipped creature attacks, it deals damage to defending player equal to the number of instant and sorcery cards in your graveyard.
Equip {2}

Flying
Prophecy {0} (Once each turn, you may exile a card with prophecy as you reveal it. When you do, you may cast it for its prophecy cost as long as it's exiled.)

Each player chooses one card in their hand, then discards the rest.

Street Busker gets +2/+0 as long as you've gained life this turn.

When Street Stalker enters the battlefield, target opponent loses 1 life for each creature you control named Street Stalker.

Enchant creature
Enchanted creature gets +1/+0 and can't be blocked by creatures with greater mana values.