You control the effect, so you use it on your turn, which lets you play cards like sorceries and creatures and even drop a land
(9/9/2022) If you choose not to cast the card, it remains in exile
$0.49 Donatello, Gadget Master Teenage Mutant Ninja Turtles $2.99 Michelangelo, Improviser Teenage Mutant Ninja Turtles $3.99 Michelangelo, Weirdness to 11 Teenage Mutant Ninja Turtles $0.49 Mikey & Don, Party Planners Teenage Mutant Ninja Turtles $5.99 Raph & Mikey, Troublemakers Teenage Mutant Ninja Turtles $0.79 Leader's Talent Teenage Mutant Ninja Turtles $0.49 Splinter, Radical Rat Teenage Mutant Ninja Turtles $1.99 Mikey & Leo, Chaos & Order Teenage Mutant Ninja Turtles $1.99 Mutagen Man, Living Ooze Teenage Mutant Ninja Turtles $6.49 Dark Leo & Shredder Teenage Mutant Ninja Turtles $0.49 Raph & Leo, Sibling Rivals Teenage Mutant Ninja Turtles $4.99 The Ooze Teenage Mutant Ninja Turtles 0 results found
[39] Commander Two-Headed Giant is an official variant launched by Wizards of the Coast in 2025
Card advantage can matter if you can use it to deny your opponent all access to the game
In particular I could see it doing work in a deck with Ramos, Dragon Engine