>>12886132let's do the math here
Echoed voice starts at 40 BP add STAB and you get 60, second turn it's used, this is doubled PLUS the extra 10% from the metronome, so, it becomes a move with a power of 132, the 120 doubles to 240 on the next turn, and the metronome adds and additional 20%, making it 288, after this, Echoed voice+ STAB caps the power at 300, add the 30% and that becomes 390, after that, it's additions of power come from the metronome alone, going all the way up to 600 base power on ten turns used.
