Its not actually bad for you, but might be something that would deter newer players from using this
You can build around any number of cards, but 4-9 is a good place to start
Etrata, Deadly Fugitive and Roshan, Hidden Magister Etrata AND Roshan
Axebane Guardian Axebane Guardian is an improved version of Overgrown Battlement since you can add mana of any color based on the number of creatures with defender you control
In fact, I speak it anytime I play a Counterspell that counters and does something else bad for my opponent
They still feel a little bit odd overall, at least in our opinion, but that doesnt mean we cant take a look at how strong they may or may not be in everyones favorite format, Commander