If you do, create a token that's a copy of that creature, except it's a 1/1 Food Golem artifact creature in addition to its other types and it has ", , Sacrifice this token: You gain 3 life." Whenever another nontoken creature you control dies, you may exile it
From a mechanical perspective, this life loss drawback is reminiscent of black cards like Phyrexian Negator or Plague Spitter, but with a redemptive twist built in
To compensate, they were forced to cut and paste chunks of cards from one set to the next so that each set wouldn't be too overwhelming
By skirting around this restriction, Helm of the Host allows you to double up on your Commander or most useful cards with abandon
Since Mirri, Weatherlight Duelist has first strike, you dont have to worry as much about attacking with it to benefit from its abilities
I really don't feel like making those alterations (my current PSD makes doing so really awkward, but I might give it a shot later if I decided to redo the blanks from scratch)