Define the deck’s game plan
Identify the key cards and win conditions
Shuffle and draw opening hands repeatedly
Test mulligan decisions
Play goldfish games against no opponent
Track mana curve and color consistency
Test early, mid, and late game draws
Check for dead cards and clunky hands
Test against common deck archetypes
Record win rates and loss patterns
Adjust card counts based on results
Test sideboard plans if applicable
Repeat testing after each change
Compare results across multiple matches
Verify rules interactions and card synergies
Test under different starting hand sizes
Evaluate tempo, consistency, and resilience
Practice sequencing and resource management
Review games for misplays and weak lines
Refine the deck until performance stabilizes