The mechanic simply takes advantage of the ability to create digital cards that didnt exist in a deck at the beginning of the match and will disappear once it is over
Floodborn glimmers are the most unique, having been created by the same event that caused the Illumineers to disappear and are much more powerful versions of the characters
[5] In any case, if a Deck Master is Special Summoned during a Duel, it retains its Deck Master ability, as well as any monster effects it normally possesses, [Note 5] but is now vulnerable to attacks and other card effects
Effect(Official) When this card is Normal Summoned, you can Special Summon a number of "Compass Tokens" (Machine-Type/EARTH/Level 1/ATK 0/DEF 0) up to the number of monsters your opponent controls
Much like Phantom Forces saw every one of its EX s be competitively relevant at some point during its Standard lifetime, it seems Guardians Rising is on its way to the same being true of its GX s though, Kommo-o- GX might be a stretch