Lifelink (Damage dealt by the creature also causes its controller to gain that much life.), toxic 1 (Players dealt combat damage by this creature also get a poison counter.) Whenever you proliferate (Choose any number of permanents and/or players, then give each another counter of each kind already there.), choose one — • If you don't control a creature named The Hollow Sentinel, create The Hollow Sentinel, a legendary 3/3 colorless Phyrexian Golem artifact creature token. • Target artifact creature you control gains flying (This creature can't be blocked except by creatures with flying or reach.) and lifelink (Damage dealt by the creature also causes its controller to gain that much life.) until end of turn.