Red Planet Ray Gun

From Archon Arcana
Red Planet Ray Gun • Mars • Upgrade • Uncommon • This creature gains, “Reap: Choose a creature. Deal 1Damage icon to that creature for each Mars creature in play.” • Artist: Caravan Studio • Card Number: CotA (211), AoA (187)

Red Planet Ray Gun
This creature gains, “Reap: Choose a creature. Deal 1Damage icon to that creature for each Mars creature in play.”
CotA 211
AoA 187

Commentary

If an ability says "Choose a creature," the Active Player may choose a Friendly or Enemy creature when resolving the effect.

Source: Rulebook
The additional Reap: ability granted by Red Planet Ray Gun is resolved along with any other Reap: abilities of the creature, in the order of the active player's choosing.

Source: Reap