It seems you're asking about the from Championship Manager 03/04 (CM 03/04), specifically looking for team instructions and how to apply that tactic in a 2021 context (likely meaning a modern replay, a modded database, or a retro tactic discussion from that year).
The secret to the Diablo tactic lies in the specific movement arrows: cm 03 04 diablo tactic team instructions 2021
: Set passing to direct. No forward runs. Hold position. It seems you're asking about the from Championship
This is the most important player on the pitch. He operates as a "Trequartista" or "Enganche." a modded database