It needs a shell, but I think itll find one in Standard, or create one
Here's what I struggled with: there's a lot of sweet creatures that benefit from tapping and untapping, like drawing cards off Ghostly Pilferer and Arbiter of the Ideal, generating mana with Magda, Brazen Outlaw, copying stuff with Felhide Spiritbinder, or (my favorite) bouncing stuff with Surgespanner
For the cost of two mana, Sigarda is even capable of creating a 1/1 Human token by exiling a card from its controller's graveyard
Max speed Whenever you draw a card, each opponent mills two cards
These take effect as explained by the text on the card
As a reminder, characters who have been played on the same turn cannot be used for any ability - including questing