Attacks » Max Lance
Can I use Ice Rider Calyrex VMAX's "Max Lance" attack to discard 2 Double Colorless Energy cards?
Yes, you can select 1 Energy of each Double Colorless Energy to discard both of them. And it would do 240 more damage because you discarded 2 cards.
Source: TPCi Rules Team (2022-03-03)
Attacks » Max Lance
If I use Ice Rider Calyrex VMAX's "Max Lance" attack to discard a Double Colorless Energy, does it do 120 or 240 more damage?
The additional damage is done per each card discarded, so if you discard only one card it only does 120 more damage.
Source: TPCi Rules Team (2022-03-03)