I like how these equipment have different equip costs, but have you considered using two-brid mana? For example, this could be .

Edit: Looking at it, that may actually be silly. Different costs may be the way to go. Also easier to balance that way.

Actually, my first thought was "Gee... the difference in cost between and isn't that great... especially when you consider the caster already paid to get this out, so you know he/she has it."

The two-brid mana equip cost does, at least, have the benefit of being a real discount, as opposed to using-a-coupon-to-get-3%-off discount.

originally there was only one equip cost, the hybrid one. the colorless cost is merely ceremonial for other colors. not everything has to be overpowered. this is already on the level of batterskull. that 1 mana discount could make a huge different.

A 4/4 unblockable for 5 is pretty gosh darn good.

I fear intimidate is a very bad choice for living weapon, especially one without reminder text. How many people really think of the 0/0 living weapon Germ tokens as colourless? How many people would guess that a black creature could block this?

A 4/4 for 5 unblockable is good. Equipping it is pretty damn good too. It sure isn't Batterskull... but I don't know how fair it is to compare anything to one of the best pieces of equipment ever made. (If I was to rank them, I'd say number one would be Skullclamp, number 2 would be Umezawa's Jitte and I'd probably put Batterskull as 3... assuming I'm not forgetting anything). Oh, hey, that last paragraph looks like I'm arguing the power level on this card isn't spot on. It looks good to me... I just type too much some times.

I do agree that not everything has to be overpowered, and the 1 mana discount can make a huge difference. That doesn't stop the difference being perceived as superfluous. As far as I'm concerned, when something looks superfluous, then it is superfluous, since perception has a much higher value in design than reality. If a player, however, realizes that there's quite a bit of added value in what they once thought was superfluous... then that is an excellent design dynamic. Personally, though, I don't think this is that... though I'm quite sure a number of people would disagree with me.

Ooh, good point, Alex. Maybe this should just have something like "Can't be blocked except by black creatures"... or just artifact creatures... or whatever else amuseum thinks is appropriate...