Dragonlord Tujaito

When Dragonlord Tujaito enters the battlefield,
create a legendary artifact token named The
Chalice of Roaring Water. It has Indestructible
and "{t}, Remove a water counter: target creature
you control gains flying and +3/+0 until end of
turn."
Whenever you cast or copy a spell with mana
value four or greater, you may pay {u}, if you do,
put a water counter on a permanent you control.