Ascend to Immortality

Each player sacrifices two non-legendary permanents and spells of each type.
Until your next turn, you cannot lose life and permanents you control gain Indestructible.
After all they had endured, the Archmages of the Citadel refused to yield to the ravages of time. Though their methods varied, each found a way to tranform into an immortal creature, and none cared how much innocent blood was spilled in the process.