Animate Bone Minions

Looking for the necro skill ' Animate Bone Minions ' .. Anyone help?

you get it from the trainer in pre-ascalon

That would be horrors.

Minions and fiends are purchasable from the skill trainer in the town right before iron mines of moladune in southern shiverpeaks. Copperhead Mines I believe.

I stole that skill from the necromancer boss (using signet of capture) on the mission right before lion's arch.

You can buy it at one of the later trainers. I believe Animate Bone Minions is available via a quest, in Fisherman's Haven iirc. You can capture both Animate Bone Minions and Bone Fiends from bosses in Kryta- Bone Minions can be captured from bosses that can be found in the Gates of Kryta and D'Alessio Seaboard missions, while Bone Fiends can be captured from a boss in Gates of Kryta or the boss for the "Reversing the Skales" quest that you get from Captain Greywind. Look for the Zombie Warlocks for Animate Bone Minions and Necrid Horsemen for Animate Bone Fiend.