Is Fleecemane Lion legal in Standard, Modern, and Commander?

Fleecemane Lion is legal in: Modern, Pioneer, Legacy, Vintage, Commander, Historic.

Fleecemane Lion

Q: What type of card is Fleecemane Lion?

Fleecemane Lion is a Creature — Cat. Its oracle text reads: "{3}{G}{W}: Monstrosity 1. (If this creature isn't monstrous, put a +1/+1 counter on it and it becomes monstrous.)As long as Fleecemane Lion is monstrous, it has hexproof and indestructible."

Creature — Cat

: Monstrosity 1. (If this creature isn't monstrous, put a +1/+1 counter on it and it becomes monstrous.)<br>As long as Fleecemane Lion is monstrous, it has hexproof and indestructible.