None of the tapping requires mana or tapping her, so you can do them on arrival to the battlefield and as many times as you have untapped stuff
The Time Spiral block had a time theme, with the three sets representing the past, present (okay, alternative-reality present), and future
By locking down colorless mana and colored mana sources alike, it can stop your opponents from activating their lands for mana entirely, which practically warps the rules of the game in your favor
These codes will often reward you with a card style, which is a skin of sorts for specific cards, or artwork for sleeves, so you can make your deck look a bit fancier
You are only allowed to have one Miracle Energy in your deck, and it is only compatible with your Shining or Light Pokemon