Is Krakilin legal in Standard, Modern, and Commander?

Krakilin is legal in: Legacy, Vintage, Commander.

What type of card is Krakilin?

Krakilin is a Creature — Beast. Its oracle text reads: "This creature enters with X +1/+1 counters on it. {1}{G}: Regenerate this creature. *"A perfect reflection of its world: brutal, fetal, and lacking truth." —Oracle *en*-Vec* Power/Toughness: 0/0"