Algom, Keeper of the Swamp

Annihilator 1 Hexproof Indestructible
{10} Makes it unblock able until the end of turn
{10}{5} Gives it doubles its power and toughness until end of the turn
{10}{10} Gives Annihilator 10 until the end of turn
{10}{10} Makes all until the end of the turn effects become permanent