
Partner with Pako, Arcane Retriever (When this creature enters, target player may put Pako into their hand from their library, then shuffle.)
You may play lands and cast noncreature spells from among cards you exiled that have fetch counters on them, and you may spend mana as though it were mana of any color to cast those spells.
Haldan, Avid Arcanist has 1 printing, first in Commander 2020 (2020). EDHREC ranks it #11,472 among Commander cards. 1 public deck on TCG runs it. It has 12 official rulings.
Cards that show up in the same decks on EDHREC.