Atraxa's Proliferating Poison EDH (EDH / Commander)

A poison counters deck that seeks to get poison counters on opponents (via toxic, infect, or cards like prologue to phyresis) and then use proliferate to poison out opponents. Mid-range approach that is looking to gain incremental advantage through efficient threats and additional value, such as enabling corrupted, rather than being explosive or highly disruptive. +1 / +1 counter sub-theme means evasive creatures can be grown into large threats as an alternative game plan.

It protects its board through spells like Heroic Intervention and uses interaction to clear away key problems. As such it's a mix of +1/+1 and proliferate enablers or pay offs, board control, protection, and point removal.

Given the role of Atraxa in the deck, the opening hand is looking to have mana fixing (to cast her at least turn 4), repeatable card draw (such as sylvan library) and a counter enabler (such as plaxcaster frogling).

Power level 6 as a tuned deck with a good amount of interaction and protection but no infinite combos.