Forever after, she lived in fear of the madness reclaiming her.

Frenzied Fugue

Enchant permanent
When this Aura enters and at the beginning of your upkeep, gain control of enchanted permanent until end of turn. Untap that permanent. It gains haste until end of turn.

The List

Treasure Chest

Commander 2016

Enchant permanent
When Frenzied Fugue enters the battlefield or at the beginning of your upkeep, gain control of enchanted permanent until end of turn. Untap that permanent. It gains haste until end of turn.

The triggered ability triggers both when Frenzied Fugue enters the battlefield and at the beginning of your upkeep. You don't have to choose only one.

You won't control the enchanted permanent as your upkeep begins. Any "at the beginning of your upkeep" abilities it has won't trigger during your upkeep (unless you already controlled the permanent). Similarly, if you have an "at the beginning of your upkeep" ability that targets a permanent you control, that ability can't target it.