Q1: What does "X or more total colors" mean, exactly?
It refers to when a card has as many or more total colors than the number specified.
Lv.4 Birdramon ST20-03 C Champion | Vaccine | Giant Bird/ADVENTURE [Digivolve] Lv.3 w/[ADVENTURE] trait: Cost 2 [On Play] [When Digivolving] If your Tamers with the [ADVENTURE] trait have 3 or more total colors, this Digimon may digivolve into a Digimon card with the [ADVENTURE] trait in the hand without paying the cost. --- Inherited: [Your Turn] This Digimon gets +2000 DP.
Lv.4 Birdramon ST20-03 C Champion | Vaccine | Giant Bird/ADVENTURE [Digivolve] Lv.3 w/[ADVENTURE] trait: Cost 2 [On Play] [When Digivolving] If your Tamers with the [ADVENTURE] trait have 3 or more total colors, this Digimon may digivolve into a Digimon card with the [ADVENTURE] trait in the hand without paying the cost. --- Inherited: [Your Turn] This Digimon gets +2000 DP.
Lv.4 Birdramon ST20-03 C Champion | Vaccine | Giant Bird/ADVENTURE [Digivolve] Lv.3 w/[ADVENTURE] trait: Cost 2 [On Play] [When Digivolving] If your Tamers with the [ADVENTURE] trait have 3 or more total colors, this Digimon may digivolve into a Digimon card with the [ADVENTURE] trait in the hand without paying the cost. --- Inherited: [Your Turn] This Digimon gets +2000 DP.