Kicker 1U (You may pay an additional 1U as you cast this spell.)

When Slinn Voda, the Rising Deep enters the battlefield, if it was kicked, return all creatures to their owners hands except for Merfolk, Krakens, Leviathans, Octopuses, and Serpents.

Ascend (If you control ten or more permanents, you get the citys blessing for the rest of the game.)

As long as you have the citys blessing, Slippery Scoundrel has hexproof and cant be blocked.

Whenever Slith Strider becomes blocked, draw a card.

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

Tap up to two target creatures. Those creatures dont untap during their controllers next untap step.

Draw two cards, then discard a card.

Search your library for an instant or sorcery card, reveal it, put it into your hand, then shuffle.

Soulcipher Board enters the battlefield with three omen counters on it.

1U, TAP: Look at the top two cards of your library. Put one of them into your graveyard.

Whenever a creature card is put into your graveyard from anywhere, remove an omen counter from Soulcipher Board. Then if it has no omen counters on it, transform it.

Flying

Cipherbound Spirit can block only creatures with flying.

3U: Draw two cards, then discard a card.

When Specimen Collector enters the battlefield, create a 1/1 green Squirrel creature token and a 0/3 blue Crab creature token.

When Specimen Collector dies, create a token thats a copy of target token you control.