It would have been cool to see it as a common
This mechanic is a refined version of Ninjitsu, and allows for an attacking unblocked creature to be returned to your hand, and a new creature or spell cast for its Sneak cost
Any of our big Dinosaurs that have trample are potential finishers
Though that combo isn't quick enough to make Enduring Tenacity more than a bit player in Standard, it's the kind of card that life-gain and life-drain decks in EDH love to play with, as it's effectively a second copy of Sanguine Bond (albeit cheaper and slightly more vulnerable to exile-based removal)
Add the cards Shift ability to the mix - which enables players to place it for four ink, instead of the usual seven, if they already have a Milo Thatch card on the board - and Milo Thatch, King of Atlantis proves to be a rather formidable Lorcana emerald card.
But this isn't a combo deck that relies on having exactly the right cards - it uses a lot of ramp abilities to increase your ink and card draw abilities to stock your hand
