Thanos, The Mad Titan

Thanos, The Mad Titan can't be Countered, Exiled or put into Graveyard when he is cast.
{t}{2}{g}Search for Basic Land Cards and put it on your battlefield tapped.
If you have at least 1 mana of each colour type on battlefield pay{w}{u}{b}{r}{g} Thanos, The Mad Titan gets Annihilate 5, is unlockable, is indestructible and can't be put into Exile or into Graveyard from Battlefield until end of turn.