For a limited time, Humble Bundle offers the following Steam DLCs for Minion Masters €3.12 apiece (down from €12.49):
https://www.humblebundle.com/store/minion-masters-accursed-army-pack
https://www.humblebundle.com/store/minion-masters-might-of-the-slither-lords
https://www.humblebundle.com/store/minion-masters-voidborne-onslaught
Timer of the discount as of this writing:
They're all pretty good value if you don't have them and like this great action battler (at least at this price, although some of them were free in past deals). Beware: if you already own a DLC on Steam, you can't redeem it again! So make sure to only buy one(s) that you don't already have in your Steam library.
Enjoy! Good luck, have fun.
Edited