Before: [On Play] [When Digivolving] Trash cards in your hand until it has 4 left. Then, play 1 8000 DP or lower Digimon card from your trash.
After: [On Play] [When Digivolving] Trash cards in your hand until it has 4 left. Then, play 1 8000 DP or lower Digimon card from your trash without paying the cost.
Read as the errata when playing.