Yes you can respond to “at the beginning of your upkeep” triggers, but no this doesnt work the way you state because all of the “at the beginning of your upkeep” triggers get put on the stack at the same time and then can be responded to.

Can you use Mirage Mirror multiple times?

If you activate Mirage Mirror’s ability multiple times in a turn in response to itself, then each time one of those abilities resolves, it will overwrite whatever Mirage Mirror is copying. If an effect begins to apply to Mirage Mirror before it becomes a copy of another permanent, that effect will continue to apply.

Is your untap step before your upkeep?

b. Upkeep Step – This happens directly after untap and is the first time players may take action during a turn. Abilities that trigger at the beginning of upkeep go on the stack, and then players can play instants and abilities. Once that is done, both players may play spells and abilities.

Can you do anything before untap step?

The most common question about this is, “Can I do something in my untap step before I untap?” And the answer is “No.” Your last chance to do anything before you untap is your opponent’s end step. Once your turn starts, the first thing that happens is you untap, then you move to your upkeep.

What happens to Mirage mirror when the turn ends?

Mirage Mirror will wind up as a copy of the permanent targeted by the last ability to resolve. When the turn ends, all instances of the ability will wear off at the same time. If an effect begins to apply to Mirage Mirror before it becomes a copy of another permanent, that effect will continue to apply.

What happens when Mirage mirror becomes a copy of an aura?

If Mirage Mirror becomes a copy of a legendary permanent you control, you’ll put one of them into your graveyard. If Mirage Mirror becomes a copy of an Aura, it’s put into its owner’s graveyard unless it’s somehow attached to an appropriate object or player already.

When to check out at the Mirage Hotel?

If your travel plans necessitate a later Check-out, please contact the Front Desk to check to see if a 12:00 PM late Check-out is available, either the evening prior to your departure or the morning of your departure.

Are there shuttles from the Mirage to the airport?

Shuttles run from The Mirage to the airport from 4:15 a.m. to 12:15 a.m. every 15 and 45 minutes after the hour. The Concierge will make a shuttle reservation for you upon request.