msem-instigator

Target creature you control deals damage equal to its power to target creature with flying.

{3}{U}{U}: Monstrosity 4. (If this creature isn't monstrous, put four +1/+1 counters on it and it becomes monstrous.)
When Shorecrash Octopus becomes monstrous, return target instant or sorcery card from your graveyard to your hand.

Whenever Shoreline Stormers deals damage to a player, draw a card.
{2}{U}: Target creature can't be blocked this turn.

Heretic (Whenever you cast a spell that doesn't share a color with this creature, it gets +1/+1 until end of turn.)
When Shoring Naiad enters, if {U} was spent to cast it, you may return an instant or sorcery card from your graveyard to your hand.

You gain 1 life. Scry 1. Draw a card.

Equipped creature gets +1/+1.
Equip {1}

Search your library for two basic land cards, reveal them, put them into your hand, then shuffle. (Then exile this card. You may cast the creature later from exile.)

Shoupan Shrine enters tapped.
{T}: Add {B} or {R}.
{B/R}, {T}, Sacrifice Shoupan Shrine: Put a +1/+1 counter on target creature you control. Activate only as a sorcery.

Prevent all combat damage that would be dealt this turn. You get a glory counter. (You lose glory counters before life. A player with ten or more glory counters wins the game.)

Enchant creature
Enchanted creature gets +2/+2.
Whenever enchanted creature attacks while you control an Angel or Nephilim, put a +1/+1 counter on target attacking creature you control with lesser power.

{2/W}{2/W}: Shrapnel Golem deals 3 damage to target creature blocking it.

{T}, Sacrifice an artifact: Add {R}{R}{R}.

Choose one —
• Shredding Blizzard deals 5 damage to target creature.
• Up to three target creatures can't block this turn.

Shredding Gale deals 4 damage to each creature with flying.

Whenever equipped creature deals damage to a creature, that creature gets -2/-2 until end of turn.
Equip {2}

Flying
Revive {5}{U} ({5}{U}, 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.)

Shrewd Sikoyo can't be blocked by creatures with power 4 or greater.
Shrewd Sikoyo gets +1/+0 as long as you have at least two more cards in hand than any opponent.

Flying, vigilance

Lifelink
Whenever an Aura becomes attached to Shrieking Gnoll, put a +1/+1 counter on Shrieking Gnoll, then target creature an opponent controls gets -1/-1 until end of turn for each +1/+1 counter on Shrieking Gnoll.

Flying
Sacrifice a creature: Shrieking Nightwing gets +1/+1 until end of turn.

Flying
Resolute — At the beginning of combat on your turn, Shrill Griffin gains vigilance until end of turn if its power is greater than its base power.

Haste
Whenever you sacrifice another permanent, put a +1/+1 counter on Shrine Razer.

{T}: Add {C}.
{T}: Add one mana of any color. Activate only if you've cast a noncreature spell this turn.

{2}{U}: Target creature can't be blocked this turn.

Colorless creatures you control get +1/+1.