Onyx Tower

{T}: Add {C}.Resonance Chamber: Whenever a spell is cast, put a Resonance counter on Onyx Watchtower. {T}, Remove 3 Resonance counters: Add two mana of any one color. Spend this mana only to cast Bard or Dragon spells.{flavor}“The stones don’t just hold the history of the war; they hold the echo of every note ever played.”