Tapping doesnt always matter, but you do always get Scry 1 draw a card, and when tapping does matter or even better when you have a tap payoff in play this gets significantly better
Theres nothing better than a Magic: The Gathering Commander night with friends, and Wizards of the Coast keeps releasing plenty of preconstructed decks so you can jump right in with friends or start to build around a choice card
Dread Summons $6.99 A milling X spell that generates Zombie tokens is a really good payoff for zombie and mill decks
Perhaps you really want a go on something in their bin - time to exile it with Ashiok for the -X
This is a commander with fairly generic powers that can feel a bit 'jack of all trades, master of none'
But yeah, Doctor #4 has a once-per-turn effect that lets you play historic cards (that's to say, legendary cards, artifacts, and sagas) from the top