Glorious Thermogenesis

Customize (As you cast this spell, for each set of
square brackets, choose one option and pay its cost.)
Glorious Thermogenesis deals
[({r}-3 damage)
({r}{r}-4 damage)
({r}{r}{r}-5 damage)] to
[({1}{dash}target player)
({2}{dash}target creature or planeswalker)
({3}{dash}each creature)]