Giratina, Lord of Distortion

Crowned, Commander
Giratina, Lord of Distortion enters tapped.
Giratina, Lord of Distortion can only be untapped during an untap step.
{t},{x}: Summon X+1 Distortion World.
{b}{b}{x}: All creatures with Griseous Attunement gain +X/+X until end of turn.