March of the Machine Commander

Bloodhill Bastion

Whenever a creature enters the battlefield, it gains double strike and haste until end of turn.
Whenever chaos ensues, exile target nontoken creature you control, then return it to the battlefield under your control.

Whenever a creature enters, it gains double strike and haste until end of turn.
Whenever chaos ensues, exile target nontoken creature you control, then return it to the battlefield under your control.

Planechase Anthology Planes

Whenever a creature enters the battlefield, it gains double strike and haste until end of turn.
Whenever you roll {Chaos}, exile target nontoken creature you control, then return it to the battlefield under your control.

Planechase 2012 Planes

Whenever a creature enters the battlefield, it gains double strike and haste until end of turn.
Whenever you roll chaos, exile target nontoken creature you control, then return it to the battlefield under your control.