Since the effect of this card is dependent on how many swamps you control, it functions best when featured in a mono-black deck
I think theyre likely to look at either Final Fantasy 10 or Final Fantasy 13 as a potential deck theme, since both of those games have multiple entries that are set in their own world
We can cast it as a normal 2/2, or we can bestow it for one mana, giving any creature flying, haste, and +2/+2
Fighting a creature isnt pinging but Nightfall Predator gives Daybreak Ranger just enough teeth to make it worth considering if you find your local meta overtaken by fliers
Trigger doublers are already a good start, and theres lots of potential subthemes to explore with Isshin, like myriad, mobilize, or firebending, to name a few mechanics
Other players just like the feeling of opening new card boosters