Siege of Elathen

When this permanent enters the battlefield, choose
either "Besieged" or "Assault" and apply that effect
to Siege of Elathen. "Besieged"-Whenever a creature
or artifact permanent you control is destroyed, you can target a permanent your opponent controls with a
lower mana cost and destroy it. "Assault"-When a creature permanent controlled by
a opponent is destroyed, add a "siege" counter to this
card. Sacrifice this permanent with 12 or more "siege" counters and deal damage to a targe