Theran, the Time Magus

Temporal Rift —{u/r}{u/r}, Reveal this card from your hand or command zone: Create a token copy of this creature. It gains haste until end of turn. Exile it at the end of turn. (Activate only during your upkeep and only once each turn.)

Theran, the Time Magus power and toughness is equal to the number of turns you have taken.

Whenever Theran, the Time Magus deals combat damage
to a player, you may cast any number of spells with a mana value equal to or less than the damage dealt as if