This kind of deck probably exists somewhere out there and might be closest to an Athreos, God of Passage with some roles reversed
There have been cases were I had Incomplete Holo Error cards that were in PSA slabs with the error listed, resubmitted and come to find out, they decided to stop labeling that error going forward
The drawback is his 1 Strength, making him an easy target or removal if you're playing the proper colors
I also personally enjoy disincentivizing cards that stop people from wanting to attack players
With Acidic Dagger, youre committing to pay eight mana to kill a single creature
To complement Leyline Prowler and Cavalier of Night as good natural lifelinkers Ikra has access to, black has several others, but don't bother looking to add red or blue white is your best bet and can add Mangara, the Diplomat, Radiant Solar, and Rhox Faithmender