Ghitu Chronicler

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

When this creature enters, if it was kicked, return target creature an opponent controls to its owner's hand.

Whenever you cast an instant or sorcery spell, this creature gets +2/+0 until end of turn.

Mutate (If you cast this spell for its mutate cost, put it over or under target non-Human creature you own. They mutate into the creature on top plus all abilities from under it.)

Whenever this creature mutates, return target instant or sorcery card from your graveyard to your hand.

Prowess

When this creature enters, if there are twenty or more instant and/or sorcery cards among cards in your graveyard, hand, and library, you may discard a card. If you do, seek an instant or sorcery card.

First strike

When this creature enters, exile target instant or sorcery card from an opponent's graveyard. You may cast it this turn, and mana of any type can be spent to cast that spell. If that spell would be put into a graveyard, exile it instead.

Kicker and/or (You may pay an additional and/or as you cast this spell.)

When this creature enters, if it was kicked with its kicker, target player discards two cards.

When this creature enters, if it was kicked with its kicker, destroy target enchantment.

As long as there are two or more instant and/or sorcery cards in your graveyard, this creature gets +1/+0 and has haste. (It can attack and as soon as it comes under your control.)