Phyrexian Metamorph (Toppers) [Double Masters] H20 Kill Team: Arena explains everything

Kill Team: Arena explains everything you need to know about playing competitive games of Kill Team

The reverse allows you to identify the fighters in your warband

−1: Return target creature to its owner's hand

but I didn't expect it from the building itself

You can only use this effect of "Mermail Abyssteus" once per turn

Phyrexian Metamorph (Toppers) [Double Masters] H20 Kill Team: Arena explains everythingSet: Double Masters Type: Artifact Creature Phyrexian Shapeshifter Rarity: Rare Cost: {3}{U P} ({U P} can be paid with either {U} or 2 life.) You may have Phyrexian Metamorph enter the battlefield as a copy of any artifact or creature on the battlefield, except it's an artifact in addition to its other types.