Allfather, The Great Barrier

Indestructible, Reach
Creatures without flying can't attack you.
Creatures you control can't attack. You have
hexproof.
If an ability of a permanent you control would
trigger, it triggers twice instead.
You can't target opponents, permanents they control,
their libraries, hands, or graveyards.
If you or a creature you control would take damage, instead Allfather loses all abilities
and has base power and toughness 10/10