Part of the reason for this ban is to prevent the format from being dominated by some of these insanely powerful cards, which makes sense when you look at which cards we know have been banned so far
However, theyre a great starting point and can be easily upgraded with missing pieces
Six mana to get out, and then you have to get 10 counters on him to actually hand out double strike
You lose out on indestructible, trading it for a +1/+1 counter and hexproof until end of turn
Blood Token Blood Tokens , generated by various means, can fine-tune your hand by transforming unwanted cards into new draws, or allowing you to toss things to your graveyard for later use
Two of the biggest reasons it is so likely to continue to be legal everywhere is because of how much counterplay it affords, and even more importantly, how much it gets people to put creatures in their deck that would otherwise be basically creatureless