Atraxa, Praetors Voice Atraxa, Praetors' Voice is the kind of proliferate commander that your opponents will see and immediately be worried about, so it might be worth just saying that youre playing group hug
If theres no good targets, simply use Ice to cantrip
What I can help with: Fearow has an artwork version: image424325 66.5 KB Raticate has this image419294 67.1 KB Butterfree has a lot of them image1271724 175 KB Im using tcgcollector and cardmarket to search on them
With cards like Hellrider kicking out other recent four-drops like Moltensteel Dragon (which is actually a four-drop) and red getting more curve-toppers like Thundermaw Hellkite and Zealous Conscripts, RPTS is another card that was better years ago as it was a curve-topper that could be supplemented by another three or four mana spell at the top of the curve when you alpha striked
Like most of these cards, at the time they were released they werent actually that game breaking
Prologue to Phyresis Prologue to Phyresis is a nice cantrip in proliferate and infect decks since it starts the infection