Whenever you cast a multicolored spell, create a Treasure token.

At the beginning of your end step, put a +1/+1 counter on each tapped creature you control.
{G}{W}{U}, Remove five counters from among creatures you control, Sacrifice Severin's Masterwork: Create Chaneryx, Perfect Lifeform, a legendary 10/10 green, white, and blue Leviathan creature token with ward {10}.

You may remove +1/+1 counters from creatures you control as though they were loyalty counters on Severin, Sparkmind to pay its loyalty costs.
[0]: Create a 0/0 colorless Robot artifact creature token with two +1/+1 counters on it.
[–2]: You may tap or untap each of up to three target permanents.
[–7]: If it isn't an extra turn, take an extra turn after this one.

When Shadow Sky enters and whenever you cast a spell, each creature target player controls gets -1/-1 until end of turn.

When Shaman of Rime's Fury enters, create a 0/0 colorless Spirit creature token. Put a number of +1/+1 counters on that token equal to the total number of instant and/or sorcery cards you own in exile and in your graveyard.

Until end of turn, target creature you control gets +1/+1 for each different creature type among non-Coward creatures you control. All creatures able to block it this turn do so.

Solidarity
You may look at the top card of your library any time.
You may cast creature spells that have a creature type no creature you control does from the top of your library.

Enchant creature you control
When Shatter the Reflection enters, you may destroy target artifact or enchantment.
Enchanted creature gets +1/+0 and has deathtouch.

Shell Cove enters tapped.
{T}: Add {G} or {U}.
{9}{G/U}: Shell Cove becomes a 7/7 green and blue Leviathan creature with ward {3} until end of turn. It's still a land. This ability costs {X} less to activate, where X is your devotion to green and blue. Activate only once each turn.

Vigilance
Whenever you cast a spell from anywhere other than your hand, put a +1/+1 counter on Shepherd of Steel.
When Shepherd of Steel dies, put its counters on target creature you control.

At the beginning of your end step, create a 1/1 blue Ninja creature token with “This creature can't be blocked by creatures with greater power.”
Whenever you activate a ninjutsu ability for the first time each turn, untap up to two target lands you control.

Ninjutsu {4}{G}

Ninjutsu {6}{G}. This ability costs {1} less to activate for each attacking creature you control.
Trample

Whenever a creature you control leaves the battlefield without dying, you may put a permanent card with lesser mana value from your hand onto the battlefield.

Whenever Shining Angler attacks, target creature an opponent controls blocks Shining Angler this turn if able and other creatures can't block Shining Angler this turn.
Surface {4}{B}{G}{U}

Draw cards equal to the greatest power among creatures you control. At the beginning of the next end step, discard that many cards.

Flash
Whenever one or more counters are put on another creature you control, you may put a +1/+1 counter on Shiori.
{2}: Change a target of target spell to a creature or enchantment you control with one or more counters on it.

Whenever you activate an ability that targets Shiver Elemental, you may copy that ability. You may choose new targets for the copy.

Shock deals 2 damage to any target.

Defender
Shoreline Crasher gets +2/+0 and can attack as though it didn't have defender as long as it is enchanted.

Flying
Short-Fused Firebird attacks each combat if able.
Whenever Short-Fused Firebird attacks, the next flashback cost you pay this turn costs {2} less.

Equipped creature can't be blocked by creatures with power 2 or less.
Whenever equipped creature attacks, it gets +X/+X until end of turn, where X is its power.
Equip {3}

At the beginning of combat on your turn, you gain 1 life. If you control three or more Shrines, instead you gain 3 life.

At the beginning of combat on your turn, you may tap target nonland permanent. If you control three or more Shrines, put a stun counter on it.

{4}{B}: You draw a card and you lose 1 life. This ability costs {1} less to activate for each other Shrine you control. Activate only once each turn.