Cosmo Serpent

Bestow {x}{2}{u}{g} (If you cast this card for its bestow cost, it an Aura spell with enchant creature.)

Enchanted creature has toxic X and gets +1/+1 for each each enchantment you control.

When Cosmo Serpent enters, you may search your library for any number of enchantments. If you do, put them onto the battlefield tapped.