Cunning Octopus

Cunning Octopus can't be blocked.
Camouflage {x}{u}{u} ({x}{u}{u}: This creature becomes
a copy of another target creature with converted mana
cost X until end of turn. Camouflage only if this
creature is attacking or blocking.)
As long as you control four or more basic Islands,
you may activate Cunning Octopus's Camouflage ability anytime you could cast an instant.