in his GY, he will be able to activate its effect, as Loading
Afterwards, there will either be a cut of the top record-holders (approximately the top 1/8 of participants) where players will play best two out of three matches, and the loser gets eliminated (standard tournament bracket style), with an eventual winner
If the target is legal but not destroyed (most likely because it has indestructible), its controller will create a Golem token
You can obtain these Trade Tokens through events and by permanently discarding cards that are 3 Diamond (Rare) or higher
Zombie Master Lets you discard a monster from your hand to Special Summon a Level 4 or lower Zombie-Type monster from either player's Graveyard, once per turn
I wouldn't sacrifice power level to make it work, as you are just diluting your cube at that point