Three-Sided Brass Pyramid

Three-Sided Brass Pyramid comes into play
tapped.
{t}: Add {b}, {g}, or {u}.
"They are not Pharonic at all, they marks a
secondary manna confluence, like a Manalith but
more limited. Look at the size! To make it work out
here? Or do they have other functions? It is hard to
see why they would bother if not." - Kissa, Elder
Vizer of Kefnet's Lore