Time Stone

Indestructible, if this card is exiled, return it
to its controller's library
You may cast all creatures with flash
{2}{t}: Add 1 Time counter to Time Stone
Remove 5 Time counters from Time Stone:
Take an extra turn after this one
{1}{t}: If you control Thanos, Mad Titan, put
Time Stone in the gauntlet zone
We swore an oath to protect the Time Stone with our
lives. -Dr. Strange