Its not terrible, and there is lifegain, but the financial impact will be low
Synergy All the other categories can be considered support, but you'll also need mechanics and effects to get your Oozes out on the battlefield to drown your opponents in slime
Declare Attackers Step This is where you'll choose which of your creatures are attacking, tap them to indicate they're attacking, and specify if they're attacking your opponent or a planeswalker your opponent controls
Brindle Shoat, Nest Invader and Young Wolf find a home in pauper due to the prevalence of edict (untargetted sacrifice) removal such as Chainer's Edict
Celestial Gatekeeper, Crookclaw Elder and Aven Brigadier show how WotC used to support typal strategies
Or your copy of Punishing Fire