Uesena the Ravenous

When Uesena the Ravenous enters the battlefield, destroy X target enchantments or artifacts, where
X is the number of snake creatures you control.
{b}{g}{u}: Put a 1/1 green Snake creature token
onto the battlefield, then draw a card.
Swarm-Whenever this creature deals combat
damage to a player, put that many 1/1 green
Snake creature tokens onto the battlefield.