msem-instigator

Forebode three times, then untap each Omen you control. Until end of turn, if you would draw a card while your library has no cards in it, you win the game instead. (Create three tapped colorless Omen artifact tokens with “{T}, Discard a card, Sacrifice this artifact: Draw a card.”)

Take an extra turn after this one. At any time during that turn, you may search your opponents' libraries for a card and exile it, then shuffle that player's library. You may cast that card from exile, and you may spend mana as though it were mana of any type to cast it. If you don't, shuffle that card into its owner's library.
Exile Isles Uncharted.

When Helicos Octopus enters, scry 1. If an opponent is cursed, scry 3 instead.

{U}, Give yourself a lore counter: Scry 1. This ability costs {2} more to activate for each lore counter you have.
{6}{U}, Remove three lore counters from yourself, Sacrifice Harbinger of Giradrus: Draw seven cards, then create two 4/4 red Dragon creature tokens with flying.

When Grievous Buccaneer enters, it voyages. (If it isn't blocking or targeted by another spell or ability, it phases out.)
Whenever Grievous Buccaneer phases in, tap target creature an opponent controls. That creature doesn't untap during its controller's next untap step.

Enchant opponent
Enchanted player plays with the top card of their library revealed.
Whenever enchanted player casts a spell, you may have them mill a card.

Whenever Fated Mariner attacks, forebode. (Create a tapped colorless Omen artifact token with “{T}, Discard a card, Sacrifice this artifact: Draw a card.”)
{1}{U}: Fated Mariner can't be blocked this turn.

Counter target creature spell.

When Elder Prophesier enters, look at the top five cards of your library. You may reveal a Curse card from among them and put it into your hand. Put the rest on the bottom of your library in any order.

Enchant creature
When Deathless Conscription enters, untap enchanted creature.
You control enchanted creature.

Flying
Whenever Coasting Shaledrake deals combat damage to a player, scry 1.

Enchant creature
When Claustrophobia enters, tap enchanted creature.
Enchanted creature doesn't untap during its controller's untap step.

Flash
Flying

This spell costs {2} less to cast if you control two or more Pirates.
Draw three cards.

Return up to two target creatures and/or artifacts to their owners' hands. For each permanent returned to its owner's hand this way, forebode. (Create a tapped colorless Omen artifact token with “{T}, Discard a card, Sacrifice this artifact: Draw a card.”)

This spell costs {1} less to cast for each artifact and/or enchantment you control.

Flying
Whenever a creature you control phases in, it gains flying until end of turn.

Whenever West Ward Purifier becomes tapped, you gain 1 life.

Vigilance
Whenever Watchful Navigator crews a Vehicle, that Vehicle gets +1/+1 and gains vigilance until end of turn.

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

Distribute two +1/+1 counters among one or two target creatures.

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

First strike

Flying
As long as you control exactly one other creature, that creature gets +1/+1 and has flying.

Resolute — At the beginning of combat on your turn, if Skyward Gaveller's power is greater than its base power, it gains flying until end of turn.