Ojer Pakpatiq, Deepest Epoch // Temple of Cyclical Time

Rebound has always been a slow-burn keyword: a card that hands you a second cast, but only on your next upkeep, and only once. Attaching it to every instant you cast from hand changes the math entirely. A single Fatal Push nets two removal spells across two turns; a burn spell doubles its reach; a card-draw instant refills twice off one card. The rebound trick is that the second cast is scheduled for your upkeep, so it wants effects that still function on an empty stack: removal that finds a target, direct damage, a cantrip, not a reactive counter that will fizzle for want of anything to answer. The 4/3 flier is almost incidental to what the front side does to your whole instant suite while it sticks. The death clause is the real design tension. Gods in this family return as lands, and here the flip turns a liability into a resource: Temple of Cyclical Time enters with three time counters, and each tap for blue chips one away, so the god that just died becomes a mana source counting down toward its own resurrection. You are not sacrificing tempo so much as banking it. The sorcery-speed transform back demands the counters be gone and besides, which keeps the loop honest and stops the god from bouncing between forms in a single turn. Neither half is dead weight: the front rewards a spell-dense hand, the back turns the graveyard trip into a scheduled return rather than a permanent loss.