([Digivolve] [Koromon]: Cost 0)
[Start of Your Main Phase] If you have a Tamer with [Tai Kamiya] in its name, this Digimon may digivolve into [Greymon] in your hand without paying the cost.
[Your Turn] While this Digimon has [Greymon] or [Omnimon] in its name, it gets +2000 DP.