Bastion is so good i kinda recommend getting 2 of him, because he is so different in how agressive you use him with the builds it really messes things up in your deck if you use him in the wrong build. If you use Aid Defense it is really fun to use the spell Blessing of Al'Mara on dwarf paladins & priests since they then get race Angel then and also benefit from the aid defense, if the dwarf Ironfist Paladin is in the deck you can have 3 units with aid defense, but those dwarf are sadly so slow its not useful. Train on using cleave with him, go face to face against a target and attack something else then your cleave will hit 2 targets for massive damage. Using cleave on him makes him very deadly, but you might want some AP or mobility nearby to get him to safety or get that extra hit to clean the board.