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At the time of writing, this card sells for just under $70.00
Lower Text - Promo Info BOOSTER CROSS ENCOUNTER [BT-10] CLOSECLOSE BT10-068 SR Digimon Lv.6 Gankoomon (X Antibody) Color Black Form Mega Attribute Data Type Holy Warrior/Royal Knight/X Antibody DP 12000 Cost 13 Digivolve Cost 1 4 from Lv.5 Digivolve Cost 2 4 from Lv.5 Upper Text Digivolve: 1 from [Gankoomon]Blocker[When Digivolving] You may play 1 Digimon card with [Sistermon] in its name from your hand or trash without paying its play cost
Yes, that is also the main disadvantage to getting card advantage through drawing cards and yes, discard is also weakened by diminishing returns which card draw isn't, I am not comparing discard to card draw as a way towards card advantage, just stating the facts about cards in isolation