Suggestion for wording:
All your creatures give 1 poison counter on hit (throttled). Consumes all
.
I fear Graveyard/Virus/this.
Not sure what this card adds. Poison decks are generally dedicated, in terms of variety this wouldn't add much given Arsenic and Poison are already in Death, and a duo with Water has Chrys and Puffer Fish, both creatures which give poison counters. There's scorpions to consider too, of which two require buffs but once they're going they're fairly strong.