msem-instigator

Lands target player controls don't untap during their controller's next untap step. Tap up to one target land that player controls.

Haste
At the beginning of combat on your turn, target creature or Vehicle you control gets +2/+0 until end of turn.

Destroy target tapped creature.

Flash
When Swift Savior enters, if you control a legendary creature, you may have Swift Savior deal 2 damage to target attacking or blocking creature.

Trample
When Swift Spearmaster enters, return another permanent you control to its owner's hand.

Whenever Swift-Fingered Sneak enters or attacks, you may discard a card. If you do, draw a card.

Flying, first strike
When Swiftclaw Griffin enters, return a creature you control to its owner's hand.

Hexproof (This creature can't be the target of spells or abilities your opponents control.)

Whenever Swiftspear Ambusher and exactly one other creature attack, put a +1/+1 counter on target attacking creature.

Swiftstep Cliffdweller has haste as long as you control another Goblin.

Swiftwater Cliffs enters tapped.
When Swiftwater Cliffs enters, you gain 1 life.
{T}: Add {U} or {R}.

When Swiftwheel Slayers enters, audition for red. (Create a 1/1 Construct Actor creature token, a Warrior Role giving 3/2 and trample, or a Wizard Role giving 2/2 and prowess. Roles replace older ones.)
Token creatures you control have haste.

Counter target spell. Create a Treasure token. (It's an artifact with “{T}, Sacrifice this artifact: Add one mana of any color.”)

Target player reveals their hand. Exile a nonland card from it and put a secret counter on it. As long as that card remains exiled, that player may pay {2} any time they could cast a sorcery to put it into their hand.
{X}{B}{B}, Exile Swipe Secrets from your graveyard: Until end of turn, you may cast target card you exiled with a secret counter on it and mana value X without paying its mana cost.

Swirling Dragonfire deals damage to any target equal to the number of instant and sorcery cards in your graveyard.

Flying
When Swooping Razorbeak enters, you may return another permanent you control to its owner's hand.

Sword deals 2 damage to any target.
Fuse (You may cast one or both halves of this card from your hand.)

Golden age (If you cast an instant or sorcery spell, activated a nonmana ability, and attacked this turn, enter a renaissance for this game.)
Sword Dance deals 3 damage to target attacking or blocking creature. If you're in a renaissance, Sword Dance deals 5 damage to that creature instead.

{5}, {T}, Tap an untapped creature you control: Put target card from your or a teammate's graveyard on top of its owner's library.

Enchant creature
Enchanted creature gets +2/+0 and has first strike.

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.)
Put two +1/+1 counters on target creature. If this spell was harnessed, also put a +1/+1 counter on the creature that harnessed it.

Sycophantic Aristocrat gets +2/+1 as long as you control another Noble.

At the beginning of your upkeep, you may sacrifice Sylph Spawning. If you do, create three 1/1 blue Nymph creature tokens with flying.

Vigilance
Whenever a legendary creature you control enters, investigate. (Create a colorless Clue artifact token with “{2}, Sacrifice this artifact: Draw a card.”)