Is Tainted Adversary legal in Standard, Modern, and Commander?

Tainted Adversary is legal in: Modern, Pioneer, Legacy, Vintage, Commander, Historic.

Tainted Adversary

Q: What type of card is Tainted Adversary?

Tainted Adversary is a Creature — Zombie. Its oracle text reads: "Deathtouch When this creature enters, you may pay {2}{B} any number of times. When you pay this cost one or more times, put that many +1/+1 counters on this creature, then create twice that many 2/2 black Zombie creature tokens with decayed. (A creature with decayed can't block. When it attacks, sacrifice it at end of combat.)"

Creature — Zombie

Deathtouch

When this creature enters, you may pay any number of times. When you pay this cost one or more times, put that many +1/+1 counters on this creature, then create twice that many 2/2 black Zombie creature tokens with decayed. (A creature with decayed can't block. When it attacks, sacrifice it at end of combat.)