Competing at the 2-level

Bidding against 1♣ (1NT) is analogous to a weak notrump. The agreement to borrow Landy 2♣ here is also called Landik.

After 2♣, advance as in the Landy defense to 1NT.

Otherwise, treat 1♣ (2*) like 1NT (2*). Opener has shown no suit but strength.