Greater Spell: Chain Lightning

As an additional cost to cast this spell, you may
tap an untapped Wizard you control.
This spell deals 3 damage to any target. Excess
damage may be distributed among any number
of other targets. If a creature or planeswalker
dealt damage this way would die this turn, exile
it instead. If you tapped a Wizard to cast this
spell, it deals 6 damage to that target instead.
"Now begone, pions."