You are playing 2♦ as multi
1. pre-emptive 6c major ( upgraded to normal 6c opening 3./4. seat )
2. 22-24hp balanced
and
3. 6+ card suit 16-20hp 4-5 LTC
Example of no.3:
2♦-2♠-3♠
edit: KQ98xx AQ Kx AQx (correct no cards now
1st and 2nd are rather normal I think - but number 3.... Maybe in a 2/1 style it might be useful, but in a strong club? Maybe to "pre-empt" the opponents? The opponents might not be able to overcall this way, as they might have done when opening 1♣....
Comments on the 3rd option please.

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