Dewloren, Tiger King of the Ice Barrier

WATER
1 Tuner + 1 or more non-Tuner WATER monsters Once per turn, you can return any number of face-up cards you control to the owner's hand. For each card returned to the owner's hand by this effect, this card gains 500 ATK until the End Phase.
2000
1400

Beast WATER Synchro Monster 6 synchro