Yes, you need to have delirium enabled, but the card also helps in this regard by letting you rummage on ETB
Whether that's a good thing or not, I'll leave it up to the reader, but having games progress and end in improbable, redundancy-ignoring ways sounds pretty delightful to me
You can use Agent of Treachery to steal everyones cards or Spine of Ish Sah to destroy everyones permanents
Read More: All 13 New MTG Doctor Cards Officially Revealed
The Twelfth Doctor only grants Demonstrate to the first spell you cast outside of your hand, limiting the payoff and requiring you to jump through a hoop
Regardless of phrasing, the same principles apply: read the terms, choose an offer that matches your playstyle, and make responsible play the nonnegotiable foundation of every gaming session