Proliferate works not only with poison counters, but also with other common themes like +1/+1 and -1/-1 counters, loyalty counters, and sagas
Click This card started design as a completely different card: Steam, Elemental Mage 1UR 2/2 Legendary Creature - Elemental When CARDNAME comes into play and at the beginning of each turn, all elementals gain activated abilities of all other elementals in play until end of turn
The reason it wouldn't have a chance at an 8 would be the silvering and whitening
Bracket 3: Upgraded features up to three cards from the Game Changer list, and only sparse Extra Turn effects, with no mass land denial and no early two-card infinite combos
So this is the task I'm laying out: building a Garth One-EyeGarth One-Eye deck viable enough to be playable in Bracket 2, using exclusively old cards, published before 8th Edition and its border shift
On top of that a lot of decks can easily produce the mana needed to pay for the upkeep on a Pact and so really you want to be trying to go off pretty quickly