The kicker is drawing the extra card at X=5 or greater, making Mawloc a clean 3-for-1 that leaves a large threat on board
Its face commander Kasla, the Broken Halo, has convoke itself, which helps to discount around the commander tax while also giving you control of your top deck while drawing cards when cards with convoke are cast
But it can also be used proactively, too
I switched as soon as I could because you have to unlock them first which is....sad
And like many Red cards in this oeuvre, (See Phoenixes and Hammer of Bogardan for examples), when the creature it enchants dies, you return this immediately to your hand for another go, giving you a solid aura that continues to turn any card you control into a major threat
Instead I found a deck that is capable of huge outbursts of damage because of Slip Through Space and Titans Strength but can also win games going long on the back of Jace, Vryns Prodigy, Abbot of Keral Keep, and Treasure Cruise