Check the SV10 Glory of Team Rocket card list
In Pioneer, it enables a powerful combo-esque deck where you discard Parhelion II to your dino and use Greasefang, Okiba Boss to cheat it into play
Its more than a straight game of bashing each other down to zero hit points, too
Your main counts of getting cards in the Lost Zone are 4 cards in the Lost Zone allows you to attack with Cramorant [Lost Origin], 7 cards in the Lost Zone allow you to play Mirage Gate [Lost Origin], and 10 cards in the Lost Zone allows you to attack with Sableye [Lost Origin]
They have an extra ability called cycling, but have a downside of entering the battlefield tapped, meaning you cant produce mana with them on the first turn they are played
I have a friend that used to help admin several Facebook groups with me