Flame Bluster - Clarification

[shiftrymaster68]

Magmortar Lv. X's Flame Bluster attack reads...

[R][R][R][R] Flame Bluster
Discard 2 [R] Energy attached to Magmortar. Choose one of your opponent's Pokemon. This attack does 100 damage to that Pokemon (don't apply Weakness and Resistance for Benched Pokemon). Magmortar can't use Flame Bluster during your next turn.

Am I correct in that you could discard a Duble Rainbow Energy or a Scramble to pay for its Discarding requirement? Thanks in advance!

 

[mtjimmer]

After this question was posted, we did release errata for Magmortar LV.X.

Flame Bluster now reads:
Discard 2 {Fire} Energy cards attached to Magmortar. Choose 1 of your opponent’s Pokémon. This attack does 100 damage to that Pokémon. (Don’t apply Weakness and Resistance for Benched Pokémon.) During your next turn, Magmortar can’t use Flame Bluster.

With the new wording, it's clear that you need to discard 2 Energy cards, not just 2 Energy.