Sea Serpent

Destroy target land.

Enchant land Enchanted land is a Swamp.

Enchant creature (Target a creature as you cast this. This card enters attached to that creature.) Enchanted creature has fear. (It can't be blocked except by artifact creatures and/or black creatures.)

Counter target spell.

Enchant enchantment At the beginning of the upkeep of enchanted enchantment's controller, this Aura deals 1 damage to that player.

Prevent the next X damage that would be dealt to any target this turn. Until end of turn, you may pay 1 any time you could cast an instant. If you do, prevent the next 1 damage that would be dealt to that permanent or player this turn.

Banding (Any creatures with banding, and up to one without, can attack in a band. Bands are blocked as a group. If any creatures with banding you control are blocking or being blocked by a creature, you divide that creature's combat damage, not its controller, among any of the creatures it's being blocked by or is blocking.)