Pantheon, Unbreakable Spear

Flash, Menace, Aspect
When Pantheon, the Unbreakable Spear enters
the battlefield during an opponent’s turn, it
deals 6 damage to that opponent and each
creature that opponent controls.
As long as you have the Eternal's Blessing,
creatures you control have "Whenever this
creature attacks, you may pay {2}. If you do, it
gains your choice of Double strike, Menace, or
Trample until end of turn."