Haldr, Archmage

{x}, {t}: Tap up to {x} lands controlled by any
number of opponents. You may cast instants, sorceries, and enchantments from your graveyard
this turn as though they had Flash. Exile cards
played this way if they leave the field.
The lesser sibling of Galdr, who stands atop of the
world of sorcery and swordsmanship across the
ice-dunes of Permafrost.