I suspect this is intentional, considering it is a Sword, but Ergo Sum doesn't seem to be receiving ammo from the Special Ammo Transmat in the Crucible. At least, it didn't when I took it through a match. At most, I got one shot in. Or is this a product of or a bug from the Sword's perk, where it collects less ammo? It will need some tuning in Crucible if the "collects less ammo" amounts to nearly 0 ammo in Crucible from Special Ammo Transmat.