Geometer's Arthropod

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.

Trample, reach Converge — This creature enters with a +1/+1 counter on it for each color of mana spent to cast it.

Converge — When this creature enters, exile target nonland permanent an opponent controls with mana value less than or equal to the number of colors of mana spent to cast this creature. 2: Put target card from a graveyard on the bottom of its owner's library.

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.

Vigilance Converge — When this creature enters, you may draw X cards, where X is the number of colors of mana spent to cast this spell. If you draw one or more cards this way, discard two cards.

This spell costs 3 less to cast if it targets a tapped creature. Destroy target creature.

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.)

Flying When this creature enters, put a +1/+1 counter on another target creature you control. At the beginning of combat on your turn, exile up to one target card from a graveyard.