Goryo's VengeanceReturn target legendary creature card from your graveyard to the battlefield. That creature gains haste. Exile it at the beginning of the next end step. Splice onto Arcane (As you cast an Arcane spell, you may reveal this card from your hand and pay its splice cost. If you do, add this card's effects to that spell.)

Counter target instant or sorcery spell unless its controller pays

that ability triggers an additional time

They mutate into the creature on top plus all abilities from under it

At the beginning of each end step

Put one of those cards into your hand and the rest on the bottom of your library in a random order

Blue spells you cast cost less to cast

Artifact creatures with indestructible can't be destroyed by damage

If a permanent entering causes a triggered ability of a permanent you control to trigger

put it onto the battlefield tapped

Weaver of Hope's toughness

sacrifice it

Avoidance — Whenever you cast a noncreature spell