Final level of Song Summoner is some of the most ridicilous shit I have eeeever seen. Three back to back battles. The first is easy but tedious, the second is against stronger forms of 4/5 bosses all at once, and the final, Jesus, super-overpowered boss with towers that heal him, which have 300 HP each, which respawn every three turns, four more enemies who stand by the towers and heal each other AND the towers, six more enemies that spawn in midway, four respawning laser towers that almost one-shot any unit...and if you lose, start all the way from the first fight.
Goooo to hell.