Astel, Born of the Void

This spell can't be countered.
Annihilate 3
When Astel, Born of the Void enters the battlefield, deal X damage to each opponent,
where X is the number of lands they control.
If Astel, Born of the Void would be put into a graveyard from anywhere, instead shuffle Astel,
Born of the Void into it's owners library.