Tide Elemental

Bestow {1}{u}{u} (This card is an aura until removed)
Tidal 6 (Put a tide counter on this card during your upkeep. If it already has six tide counters on it, remove the counters instead of adding one.)
If bestowed, enchanted creature has these abilities otherwise held by Tide Elemental:
This creature gets +1/+1 for each tide counter.
If this card detaches to become a creature, pay {3}{u}{u} or return it to your hand.