For example, if The Spot, Living Portal's enters-the-battlefield ability is copied and four cards are exiled, they all return when The Spot, Living Portal dies
But before even that, we had an entire month to enjoy Duskmourn with the vanilla MTG Standard flavor that we had enjoyed a few months after its rotation last September
But then
Combine this with powerful anthems, +1/+1 counters (Cathars' Crusade, anyone?), and equipment and you've got one hell of a potent commander
After Invert, theres a fairly marked shift in power level, with cards in the next tier being far more likely to see the light of day in Constructed
If a legendary permanent or an artifact entering or leaving the battlefield causes a triggered ability of a permanent you control to trigger, that ability triggers an additional time.