This is definitely closer to a cast-from-exile card than an equipment support card, but can you ever have too much card advantage
The only thingbesides the obvioustying the whole thing together is that they all feel like core pieces in different combo/synergy decks
There's a ton of other random types of counters out there, such as charge (Vivid Marsh), experience (Ezuri, Claw of Progress), age (Glacial Chasm), level (Lighthouse Chronologist), and so much more
Try removing a few filters.
Premium Boosters There are Standard-set boosters, and then there are premium boosters
By completing challenges in the Guidebook, players can open these additional packs and add cards to the respective decks