Greenflame Blade | Action

You brandish the weapon used in the spell`s
casting and make a melee attack with it against
one creature within 5 feet of you. On a hit, the
target suffers the weapon attack’s normal effects,
and you can cause fire to leap from the target to a different creature of your choice within 5 feet of
it.
The second creature takes fire damage equal to
your spellcasting ability modifier.