Nuclear Missile

Payload - You may pair this artifact with a
creature that also has payload.
Sacrifice Nuclear Missile: destroy all creatures.
Each player takes X damage, where X is the
number of creatures destroyed this way. Each
player gets a Nuclear Fallout enchantment
token with "At the beginning of your upkeep,
you lose 10 life minus the amount of times this
ability has been activated." Activate this ability
only if Nuclear Missile is paired.