For virtually no cost at all, Last Will lets you get just about anything you want and place it directly onto the battlefield
Gameplay in CCG is typically turn-based, with each player starting with a shuffled deck, then drawing and playing cards in turn to achieve a win condition before their opponent, often by scoring points or reducing their opponent's hit points
They tend to appear in high profile special expansions, and Ascended Heroes is one of the confirmed sets to feature them
It was pretty obvious they were just throwing a number out there
SE Secret Rare Crystron Quandax X WATER Level 4 [ MachineSynchroTunerEffect ] ATK 1800 DEF 2000 1 Tuner + 1+ non-Tuner monsters Once per Chain, during your opponent's Main or Battle Phase, you can (Quick Effect): Immediately after this effect resolves, Synchro Summon 1 Synchro Monster, using materials including this card you control
Draw inspiration to make your own rules and borrow aspects that you like from the games that you research to help form your game