[General] Training unit with item?

[stan0033]

IS there item ability that allows an item to train a unit and can cost gold/lumber?

 

[Wietlol]

An item cannot have cost... regulary.
You can trigger the cost.
When a unit is ordered to use the item then check if the player has enough gold and lumber and if not then issue the triggering unit to stop (after a 0 second timer).

You can spawn the unit instantly or after a delay but that delay is hard to show to the player.

 

[Tal'Rarity]

This works badly however it is somewhat possible.