Mathemagics

This spell costs 1 less to cast for each instant and sorcery card in your graveyard. Reach Whenever The Dawning Archaic attacks, you may cast target instant or sorcery card from your graveyard without paying its mana cost. If that spell would be put into your graveyard, exile it instead.

Converge — Target player draws X cards, Together as One deals X damage to any target, and you gain X life, where X is the number of colors of mana spent to cast this spell.

Create two 2/2 red and white Spirit creature tokens. Then if this spell was cast from anywhere other than your hand, put a +1/+1 counter on each Spirit you control. Flashback 4WW (You may cast this card from your graveyard for its flashback cost. Then exile it.)

When this creature enters, target player creates a 1/1 white and black Inkling creature token with flying. Then if an opponent controls more creatures than you, this creature becomes prepared. (While it's prepared, you may cast a copy of its spell. Doing so unprepares it.)

Destroy target creature or planeswalker. Its controller may search their library for a basic land card, put it onto the battlefield tapped, then shuffle.

Vigilance Repartee — Whenever you cast an instant or sorcery spell that targets a creature, create a 1/1 white and black Inkling creature token with flying.

First strike At the beginning of each end step, if an opponent has more cards in hand than you, this creature becomes prepared. (While it's prepared, you may cast a copy of its spell. Doing so unprepares it.)

Put a +1/+1 counter on each creature target player controls. Target creature gains your choice of double strike or lifelink until end of turn. Flashback 1W (You may cast this card from your graveyard for its flashback cost. Then exile it.)