While you are the only player who controls a tribute summoned monster, your opponent is completely shut off from their extra deck
If you want your deck to be competitive, chances are you'll have plenty of these in play
This means that youll be able to cast more spells on opponents turns, pinging damage, and healing yourself, without having to wait for Instant spells
Extra Deck 9 Rabid Horseman X EARTH Level 6 [ Beast-Warrior / Fusion ] ATK 2000 DEF 1700 "Battle Ox" + "Mystic Horseman" YZ-Tank Dragon X LIGHT Level 6 [ Machine / FusionEffect ] ATK 2100 DEF 2200 "Y-Dragon Head" + "Z-Metal Tank" Must first be Special Summoned (from your Extra Deck) by banishing the above cards you control
This card's only downside is that most of the time, blue doesn't want to have any creature spells in its deck at all, but this can easily fit in any other non mono-blue archetypes
And for finding people to play with, I highly recommend joining the Tricky Gym Discord (you can find link in Gym Leader Challenge website) where people interested in the format are playing games pretty much around the clock