April's supporter-exclusive was the Forgesinger Troubadour!
GMBinder: https://www.gmbinder.com/share/-OrUSyAB0pPpy42bCkRs
The Forgesinger has come very close to winning, many times, and April was finally its turn. Very similar in theme to the Cogcaller, which was next to it on the poll, but specifically geared at smithing, manufacture, and industry.
The spell list doesn't have any huge surprises: I wanted to pull in some ferromancy and some fire damage. I put heat metal on and only included enkindle as a swap, since heat metal is so much more thematic here. Cinder cloud is a slightly odd one, and I considered swapping it, but I don't have amazing options handy at 4th and it does get the feel for "that giant blast of hot air coming out of a forge hall".
Song of the Smithy is our flavor feature, but in this case a pretty impactful one: heavy armor proficiency! This is the first heavy armor troubadour; it's not a front-line fighter but it probably can be an off-tank. Also, smith's tools, obv. Hammering Beat is our defining feature, granting the troubadour themself temporary hit points while it's singing a Mystic Song. And it's intentional that they refresh on any song target's turn: if a forgesinger is tanking for the team, they might get to double- or triple-dip on these temps within a round. Your unique song is Annealing Ardah, granting an AC boost to your whole team. Notably the first song that has built-in scaling, just because at high level that +1 AC will stop feeling as cool. Forging Strike at 6th amplifies your concordant notes; when an enemy gets damaged by one, the next attack against the enemy deals bonus damage too. You get two features at 10th, since Foundry's Fires is small: one (and only one) mystic song target gets fire resistance. Metallic Music is the other, granting you some ferromancy spells the same way other subs get cleric, druid, or necromancy spells. Awakened Thews at 15th is your special rest song, granting allows resistance to prone and temp hps. And Armored in Song is the capstone: self-explanatory, all attacks against you have disadvantage while you're singing. While that might sound kinda nuts, I don't think it's as nutty as the Bloodcaller's "you can't die" version, and I love that one :) .
As always, you're invited to come discuss and offer feedback in the comments or on Discord!