Archael, Lord of the Seraphs

Flying, Haste, Vigilance, Indestructible, Trample
Whenever an angel, nephilim, or seraphim you control attacks, proliferate or gain a time counter.
{w}{w}{w}{w}: Exile target card.
{w}{w}: Your opponent reveals their hand.
If you lose the game from damage, you may
revert your health to what it was {x} turns ago
where {x} is the number of time counters you
have.