What happens when my opponent plays Switcheroo on their 2 Might unit and my empowered Gangplank, Naval?

Gangplank, Naval will replace his Might being lowered with him being given +3 Might this turn.

Swap calculates the difference in Might and generates two effects: an increase, and a decrease. When a swap effect is applied to two units’ Mights, it gives those units +Might and -Might respective to who has the higher Might.

Under the hood, Gangplank’s replacement effect sees the event of him being given -Might and replaces it with him being given +3 Might this turn instead. The event of the other unit being given +Might is unaffected by Gangplank’s replacement effect. By the time we apply the replacement effect, the difference between the two units has been calculated. In the example with the 2 Might unit, the final Mights of the two units will be 2 Might → 6 Might, and 6 Might → 9 Might.

The way this works is not immediately obvious based on how the swap game action rules are written. We will clarify this in a future rules update.

Note that this logic also applies to Mel, Newly Awakened and Switcheroo.

Riot's question and answer, word for word, from theVendetta Rules FAQ and Clarifications·Aug 14, 2026