Boros Charm

When you activate this charm, you may cast Crusader's Mantle or Haste.
Alternatively, you may cast Guiding Bolt,
and if it hits, you regain a number of hit
points equal to the damage it deals.
Spell Save DC 15, Spell Attack Bonus +7, Spellcasting Ability Modifier +4
The charm vanishes after you activate it.