Vex Mythoclast

Equipped creature gets +1/+1 for each creature that
blocks it. If the creature this card is attached to
would be destroyed, destroy this card instead. If this
card is attached to Atheon, Time's Conflux, that creature has double strike.

Equip {3}

"...a causal loop within the weapon's mechanism, suggesting that the firing process somehow binds space
and time into..."