Crown of Biohazard

•Toxicity Unleashed: At the beginning of your upkeep, put a Toxic counter on each opponent. Players with Toxic counters lose 1 life at the beginning of their upkeep for each Toxic counter they have.
•Biological Mutation: Whenever a creature you control dies, you may create a 2/2 black and green Insect Mutant token with “This creature has toxic 1.” (Players dealt combat damage by this creature also get a poison counter.)
•Regal Contagion: {2}{b}{g}: Target player gains a poison counter