The Planar Weapon

When this Boss Battle enters the battlefield, sacrifice X permanents.
You may access X abilities of The Planar Weapon.
{t}: Deal 2 damage to any target
{t}: Add {4} to your mana pool
{2}{t}: Exile target creature or planeswalker
{5}{t}:Search your library for a permanent and put on the battlefield. It has indestructible.
{8}{t}:Deal 15 damage to any target. You may only use this ability if you have at least 15 life. This cannot be Fatal.