Secrets of Strixhaven Commander

Legendary Creature — Human Wizard

The first spell you cast with {X} in its mana cost each turn costs {1} less to cast for each +1/+1 counter on Zimone.
Whenever you cast your first spell with {X} in its mana cost each turn, put two +1/+1 counters on Zimone.

Zimone, Infinite Analyst

Instant

Target player draws X cards plus an additional card for each time they've cast a commander from the command zone this game.

Commander's Insight

Edge of Eternities

Creature — Angel Warrior

Flying
When this creature enters, return target noncreature, nonland permanent card with mana value X or less from your graveyard to the battlefield, where X is the amount of mana spent to cast this creature.
Warp {2}{W}

Astelli Reclaimer

Aetherdrift

Creature — Elf Druid

During your turn, as long as you haven't activated an exhaust ability this turn, you may activate exhaust abilities as though they haven't been activated.
Exhaust — {1}{G}: Put a +1/+1 counter on this creature. (Activate each exhaust ability only once.)