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Since temporary effects applied to individual members of a Combiner team carry over to the Combined form for the turn, what happens if I have two active Sentinels, transform Wave 2 Ironhide in my KO area to give them Pierce 2, then play the Sentinel Enigma to combine them? Does Optimus Maximus then have Pierce 2 or Pierce 4?

In this scenario, Optimus Maximus would have Pierce 4.
Source: Wizards of the Coast (2019-05-28)    【Link to Ruling】
Tags: Combiner