As is, there are still some interesting interactions you can pull off
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
$0.35 Gideon's Triumph War of the Spark $0.49 Djeru, With Eyes Open Hour of Devastation $0.49 Oath of Gideon Oath of the Gatewatch $1.49 Gideon Blackblade War of the Spark $1.29 Gideon, Ally of Zendikar Battle for Zendikar $0.49 Gideon's Resolve (Planeswalker Deck) Amonkhet $0.99 Gideon, Champion of Justice Commander 2021 $0.35 Teyo, the Shieldmage War of the Spark $0.49 Gideon's Battle Cry (Planeswalker Deck) War of the Spark $2.29 Gideon, the Oathsworn (Foil - Planeswalker Deck) War of the Spark $0.99 Gideon, Champion of Justice Gatecrash $1.99 Kytheon, Hero of Akros Magic Origins 0 results found
While you can still "copy" legendary cards, you just won't be able to attack with them since they would die to the legendary rule, which makes me a little sad
Hampus build frequently had the most to do in stalled-games when both players managed to keep their hand size up
It also scales best into the late game where card draw is much better than getting more lands into play
