Defender

Landfall — Whenever a land enters the battlefield under your control, Skyclave Squid can attack this turn as though it didn’t have defender.

Whenever you draw a card, put a +1/+1 counter on Chasm Skulker.

When Chasm Skulker dies, create X 1/1 blue Squid creature tokens with islandwalk, where X is the number of +1/+1 counters on Chasm Skulker. (They can’t be blocked as long as defending player controls an Island.)

Flying

Fylamarid can’t be blocked by blue creatures.

{U}: Target creature becomes blue until end of turn.

Flying

Cephalopod Sentry’s power is equal to the number of artifacts you control.

When Gulf Squid enters the battlefield, tap all lands target player controls.

Flying

Whenever you draw a card, put a +1/+1 counter on Oneirophage.

Islandwalk (This creature can’t be blocked as long as defending player controls an Island.)

You may choose not to untap Sand Squid during your untap step.

{T}: Tap target creature. That creature doesn’t untap during its controller’s untap step for as long as Sand Squid remains tapped.