Sethrohydrox

Sethrohydrox can't attack unless you pay
{u}{u}{u} at the beginning of combat on your turn.
Unlike other creatures of the deep, Sethrohydrox do not require constant water. In fact, Sethrohydrox have been known to spend time out of water in caves and ravines. Within their aqueous skin, Sethrohydrox can carry nearly 70 gallons of water to survive for days out of water.