Where is a good place to find them
Yamotso mine or whatever it's called. Spawns 2-3 naturally inside cave.
Lure it to entrance of cave and train on it, or find a quiet spot where the priests and warriors dont go.
Alternatively.
Grab a gargoyle's pickaxe.
A sturdy shovel/pickaxe and a prospector's tool. Go to a quiet area with mountains or where you can mine.
1. Dig with sturdy once (if dull copper hop to step 3).
2. Dig with gargoyle's . If it's dull copper, use prospector's to upgrade vein to this and then.
3. Dig with gargoyle's if the vein is dull copper, the garg pickaxe will upgrade it to shadow and you have a chance of spawning a shadow elemental. Mine until vein runs out or a shadow spawns.
Rince and repeat.
Once you have a shadow elemental, you can train on it.
It has a big spawn range of wres/tac. If its wres/tac is too high, discord the ellie.
If it's too low, then discord your pet. They'll sync up eventually and you can keep both discorded.
If the ellie is way too high, you can train your pet on ortanord until it hits 55's in wres/tac and you should be in range on discorded shadow then.