Being handed such a powerful tool directly by WotC replaces the sense of discovery and ownership, especially when everyone else is playing it, too
Also, I love that Heliods triggered ability can put a +1/+1 counter on itself even when its not a creature
And when it comes to rare and valuable cards, collectors and players alike go all-in to own a piece of MTG history
Goldin Auctions brokered the bidding process
While an effect like this would usually be perceived as a drawback, it can have incredible results when paired with creatures such as the previously mentioned Kokusho, which totes powerful death triggers
As well, once Ovinomancer was active, it was nigh-unkillable itself, since returning it to your hand is part of the cost and not effect