Epic Experiment

Exile the top X cards of your library. You may cast instant and sorcery spells with mana value X or less from among them without paying their mana costs. Then put all cards exiled this way that weren't cast into your graveyard.

Exile the top X cards of your library. For each instant and sorcery card with converted mana cost X or less among them, you may cast that card without paying its mana cost. Then put all cards exiled this way that weren't cast into your graveyard.

Pioneer Masters

Outlaws of Thunder Junction Commander

Commander 2021

Time Spiral Remastered

Exile the top X cards of your library. You may cast instant and sorcery spells with converted mana cost X or less from among them without paying their mana costs. Then put all cards exiled this way that weren't cast into your graveyard.