Fusion monsters were (at a point) kind of a gimmick, allowing you to combine 2 monsters into one with Polymerization it never really took off in terms of competitive Yu-Gi-Oh, as drawing all the right pieces was near impossible
In gameplay, its a surprisingly versatile card, known for its handy attacks that can turn tricky situations in your favor
When Zur gets going, the game tilts fast in your favor
Elvish Reclaimer I dont care so much about the stat boost on Elvish Reclaimer
They wont have actually used them, presumably, because you dont see a lot of these guys
Crucial decisions during a match will often involve whether its better to crack a Lander token to ramp or add something to the board, or if you want to tap your creatures to Station your Spacecrafts and Planets, potentially exposing yourself to a big attack