Is Stoneshock Giant legal in Standard, Modern, and Commander?

Stoneshock Giant is legal in: Modern, Pioneer, Legacy, Vintage, Commander, Historic.

Stoneshock Giant

Q: What type of card is Stoneshock Giant?

Stoneshock Giant is a Creature — Giant. Its oracle text reads: "{6}{R}{R}: Monstrosity 3. (If this creature isn't monstrous, put three +1/+1 counters on it and it becomes monstrous.)When Stoneshock Giant becomes monstrous, creatures without flying your opponents control can't block this turn."

Creature — Giant

: Monstrosity 3. (If this creature isn't monstrous, put three +1/+1 counters on it and it becomes monstrous.)<br>When Stoneshock Giant becomes monstrous, creatures without flying your opponents control can't block this turn.