Kelke' Kosk, Timebender

{1}{u}{u}: Counter target spell. If that spell is countered this way, return it to its owner's hand and untap one land that player controls.
{x}{x}{u}{u}{u}: Flip X coins. Take an extra turn after this one for each coin that comes up tails. Kelke' Kosk has hexproof during those turns.
"I am the future. I am the past."