Swamp Rat
I used to bullseye swamp rats in my T-16 back home.

Arcane: Skull
Base Rarity: Ultra-Rare
Troop Type: Elemental, Beast
Troop Role: Striker
Troop Id: K05_21 / 6882
Max skills: 19    29    6    9
Kingdom: Mist of Scales
Kingdom Id: 3016
Trait #1: Regeneration
Recover 1 Life at the start of each turn.
Trait #2: Venomous
Poison enemies when doing Skull damage.
Trait #3: Swift
Start battles with 75% Mana.
Spell: Swamp Ambush
Description: Deal [Magic + 1] true damage to the last Enemy, with a 50% chance to deal [Magic + 1] true damage to the second last Enemy. Then Submerge myself.
Mana Color: Purple, Brown
Mana Cost: 12
Spell Id: 8305
Switch Release: Tuesday, Jan 1, 2030