Threnody Singer looks like a strange card for me to be maindecking a copy of, but Ive been really pleased with it as a sideboard card against Mono-Red and that matchup is so tough that I dont mind warping my deck a bit with it in mind
For example, Experiment Twelve bides its time as a 2/2, then you pay the disguise cost of and bump its stats to 4/4 and you get the rest of the abilities on Experiment Twelve, turning into an 8/8 with trample
Another is that players rarely play mass removal for enchantments, like Tranquility, Nova Cleric, or Tempest of Light, since their own enchantments get hit as well
Lets jump in
If youd have asked me before Outlaws of Thunder Junction was released, Id have said Mr
Brotherhood's End handles creatures or artifacts, whichever hampers your progress