Temporal Decay

Instead of paying Temporal Decay's mana cost or flashback cost, you may exile any number of blue
cards with total mana value 4 or greater from
your hand.
Choose upkeep step, draw step, precombat main phase, combat phase, postcombat main phase, or
end step. Target player skips the chosen step or
phase during their next turn.
Flashback {2}{u}{u}