Nami, the Tide Caller

All Merfolk creatures you control have Islandwalk.
{g/u}{g/u} : Merfolk creatures you control gain Hexproof until end of turn.
{w/u}{w/u} : Merfolk creatures you control gain Vigilance and +1/+1 until end of turn.
Eminence -- As long as Nami, the Tide Caller is in
the command zone or on the battle field, whenever you cast a Merfolk spell, you may pay {1}, if you do,
draw a card.