That version of the mechanic made enough sense in the context of FINAL FANTASY and FINAL FANTASY XIV, which inspired these Equipment cards
Kuja, Mage Manufacturer (Inalla, Archmage Ritualist) Rating: 1/10 Inalla, Archmage Ritualist looks like it could be incredibly powerful at first
The early-game removal (Conclave Tribunal and Pacifism), combined with a number of powerful life-gain effects, will allow you to make it to the mid- and late-game when you can cast any one of your 13 strong Angel creatures (including 6 rare and 5 mythic creatures!) Once you cast these powerful flyers, you will be unstoppable
Either way, Hyldas doing some work while you're tapping your opponents creatures, and just making a 4/4 elemental creature each time already goes a long way
Card advantage tracks your resources in play as well as in your hand, and these effects put you down a resource from both to then gain two resources, which is net neutral
The worst part of these cards is that normally, you need to cast them and later profit, but youre getting both effects right away here