Mana Screw

Artifact, 1 (1)
{1}: Flip a coin. If you win the flip, add {2} to your mana pool. Play this ability only any time you could play an instant.¹
There was no darker or more evil creation in all the multiverse than that of the mana screw.
Illus. Mike Raabe

Crystal Keep Rulings Summaries

• All tournament formats have banned cards from Unhinged.

Format Legality	Banned in Vintage, Legacy, Extended, Standard
Printings (2/2)	Unhinged (Uncommon) Unhinged Alternate Foils (Uncommon)