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

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.

Flying, vigilance
{1}, Discard a card: Sharlate gains indestructible until end of turn.
Each spell an opponent casts costs {VP} more to cast for each other spell that player has cast this turn.

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.

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

Flying
Ward—Sacrifice a nonland, nontoken permanent.
Whenever a creature dies, Shredding Dragon deals 1 damage to any target.

{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.

At the beginning of your upkeep, create a 1/1 white Human creature token for each Shrine you control.

Creatures you control get +1/+1 for each Shrine you control.

At the beginning of your upkeep, exile the top card of your library. You may play it this turn. If you control a number of Shrines greater than or equal to that card's mana value, you may cast it without paying its mana cost.

Untap up to X permanents you control during each other player's untap step, where X is the number of Shrines you control.

Shrine to Those Forgotten enters tapped.
{1}, {T}: Add X mana is any combination of colors, where X is the number of Shrines you control.

Flash
Whenever you cast Siflir, Elder Pawn or another spell, if you paid an alternate or additional cost to cast it, draw a card.
Wander {3}{U}{U}

Choose up to one for each color among green, white, and blue among permanents you control.
• Put two +1/+1 counters on target creature.
• Target player draws a card for each creature they control with a counter on it.
• Untap all nonland permanents target player controls.

Exile target nonland permanent with mana value less than or equal to the amount of life you've lost this turn.

Flying, trample, lifelink
Ward—Pay 7 life.

Whenever a token you control enters, put a +1/+1, flying, haste, trample, vigilance, or loyalty counter on a permanent you control other than Simul.
[+1]: Create a 1/1 green Plant creature token.
[–2]: Create a blue Aura enchantment token with enchant permanent and “When enchanted permanent dies, you draw two cards.”
[–5]: Create a 3/3 green, blue, and red Dragon creature token with flying. For each kind of counter on permanents you control, you may put a counter of that kind on it.

Exile target creature or enchantment if its mana value is less than or equal to the number of spells named Singularity you've cast this game.

When Sinister Sampler enters, exile up to one target artifact and up to one target artifact card in a graveyard.
{2}{VP}{U}{B}, {T}: Create a token that's a copy of a card exiled with Sinister Sampler. Activate only as a sorcery.

I — Siphon the Divine gains “Creatures your opponents control lose hexproof and indestructible and can't have or gain hexproof and indestructible.”
II — Target creature you control fights up to one target creature.
III — Exile target player's graveyard.

Equipped creature gets +3/+0 and has menace.
Whenever a creature you control enters, if it wasn't cast, you may attach Skeleton Keytar to it.
Equip {5}

Whenever a permanent you control enters, you may put a living counter on it.
Permanents with living counters on them are 2/2 artifact creatures in addition to their other types.

Trample
Whenever Skittertiller deals combat damage to a player, put a +1/+1 counter on it.

Whenever you cast a green spell, choose up to X, where X is the number of green mana symbols in that spell's mana cost —
• Create a 1/1 white Human creature token.
• Put a +1/+1 counter on a creature you control.
• Put a trample counter, vigilance counter, or a reach counter on a creature you control.
• Untap target land.

Trample
Whenever another creature you control becomes the target of a spell you control, create a token that's a copy of that creature, except it has haste. Sacrifice that token at the beginning of the next end step.