Completion lists · Card cycles
Evoke Elementals
Modern Horizons 2's Solitude, Endurance, Fury, Grief and Subtlety: evoke them for free by exiling a card of their color. Lorwyn's evoke creatures cost mana instead.
Track which ones you own in Mana Dork: it marks every card on the list you have, and there's an achievement for owning all 5.
Mana Dork