Gray Harbor Merfolk

Gray Harbor Merfolk can't be blocked.
Gray Harbor Merfolk gets +2/+0 as long as you control a commander that's a creature or planeswalker.

Anticipate

Look at the top three cards of your library. Put one of them into your hand and the rest on the bottom of your library in any order.

Counter target spell. Untap up to four lands.

As long as it's not your turn, spells you cast cost {1} less to cast.

Target creature gets +3/+3 until end of turn.

Flying
When Silver Raven enters the battlefield, scry 1. (Look at the top card of your library. You may put that card on the bottom of your library.)

Target creature gets +4/+4 until end of turn.

Draw two cards.
Cycling {U} ({U}, Discard this card: Draw a card.)

Tap target creature. Scry 1.
Draw a card.

Counter target spell unless its controller pays {3}.

Choose one —
• Foil Their Scheme — Counter target spell.
• Learn Their Secrets — Draw two cards, then discard two cards.

Flying
Prowess (Whenever you cast a noncreature spell, this creature gets +1/+1 until end of turn.)

Flying
Whenever you cast a noncreature spell, Sky Theater Strix gets +1/+0 until end of turn.

Magecraft — Whenever you cast or copy an instant or sorcery spell, put a +1/+1 counter on Quandrix Pledgemage.

{T}: Add {C}. Spend this mana only to cast an instant or sorcery spell.

Target creature gets +2/+2 until end of turn. If you control four or more creatures, that creature gets +4/+4 until end of turn instead.