Hymn

 is a Tier 5 Tank that upgrades from Banshee and Necromancer at level 60.

Design
The vaguely resembles the Banshee but with 4 way symmetry rather than 3 way. It has 4 turrets and 4 spawners placed alternatingly around its octagonal body.

Technical
Being a Necromancer branch, the spawns and manipulates sunchips rather than the drones of Banshee.

Trivia

 * A hymn is a type of song.