Excalibur II needs to pick up at least three charge counters before its worth equipping, and thats just not going to happen often enough to justify running it
Once youre paying that much, you cant really afford to have a design that can miss just because youre behind on board, or playing against a creatureless control deck
Strong, the Brutish Thespian Any Commander card that makes me think of an old, forgotten card like Cyclone is A+ in my book
This card costs nine ink to play, but you can bring that down to seven if you use Shift
Gray Merchant of Asphodel, Blood Artist, and Ayara, First of Locthwain all come to mind as powerful inclusions, and there are many more to discover
additionally, if Robin Hood himself is banished in a Challenge, you can draw a card