Does Riposte grant might equal to the printed energy cost of a spell, or the modified cost paid?

Ruling: Riposte grants might equal to the printed energy cost of the targeted spell, regardless of any cost modifications or alternative costs paid. For example, a Riposte targeting a Call to Glory (printed cost 3) will grant +3 might even if the Call to Glory player paid the additional cost by spending a buff instead.

Nuances:

• This applies to all cost modifications, including cost reductions, increases, and alternative costs.
• Effects that reference a card's cost always use the printed cost, not the actual cost paid.