Three mana is a lot to generate every turn, and Cormela's access to the haste keyword allows her to provide it the same turn she comes down as long as you have an extra generic mana lying around
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.
Confused To mark a Pokmon as Confused, its card must be rotated 180, so that it is vertically upside down, its name and the top of the card closest to its owner, rather than pointing towards the opponent (as you can see in the above image)
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