In most cases, the controller of the attacking creature will still become the monarch as it is likely their turn
This Human Wizard taps for two and a blue to exile a creature card from my graveyard and create a 2/2 Black Zombie creature token, and then put a +1/+1 counter on each Zombie creature I control
and various madness cards all look to be awesome and powerful options, building decks around them right now isnt as fruitful when they are still likely to get another piece or two to improve them
Saves you from buying duplicates and helps if you ever need it for insurance
Polluted Delta (Zendikar Expedition Series) The ninth most valuable card (aside from the Reserved List) is Polluted Delta, which is a fetchland, just like Scalding Tarn
The point is you have tons of cards for the archetype, which also enables some variety (even if some cards are simply better for it than others)