Every time a set with Krenko is released, we see a small spike in the cards price as Magic players the world over are suddenly reminded oh yeah, this is the best possible goblin card ever created. Its not going to pay for your pack, but you can probably convince someone to trade for it
Another crucial aspect is durability
We were sure we loved Ashiok as a sideboard card for that matchup, but once we tested it in game 1, it became clear that they actually struggled at comboing once this was on the battlefield
Don't expect this to cut opposing libraries to 0 fast enough
Whoever becomes my Ring-bearer, and by doing so becomes a legendary creature, is not something I have to declare when people are looking to interact with my spell on the stack
It conveys how terrifying New Phyrexia's invasion of Eldraine must have been during March of the Machine , complete with some concrete lore that impacts Wilds of Eldraine 's story