Dealing with any character (barring those with ward) for five ink is a steal, and youll be hard pressed to find a ruby deck without four copies
The Buster Sword also has a powerful extra ability: if the equipped creature deals combat damage to a player, you draw a card and play a spell equal to or less than the amount but that doesnt really have much narrative weight to it
This character cards ink cost is pretty reasonable, and the Willpower is just okay enough for it to be considered a balanced card despite its cheesing potential
With Dragoons Lance (another Choose A Job equipment) we see that they are reasonably being typed as Knights, as that equipment gives +1/+0, and makes them a Knight
It can be a fun card to use and combo, as exerting it and spending a cost of 1 ink lets a player guess at the top card in their deck to potentially acquire it
This has a nice synergy with Vanish cards, as the keyword doesn't affect one's own Actions, but only the opponent's