Serpaquey Titan

Islandwalk, Hexproof
{3}{u}{u}: Monstrosity 2. (If this creature isn't monstous, put two +1/+1 counters on it
and it becomes monstrous)
When Serpaquey Titan becomes
monstrous, blue spell you control cost one
less to cast for as long as you control Serpaquey Titan.