Capricious Efreet is kind of cool if you want sacrifice triggers anyway, and if there are two horrid enchantments out there to target, say a Rhystic Study and a Necropotence, well, you have a 67% chance of nabbing one
Here is my favorite Town design that didn't work out as it added yet another source of tracking complexity: Besaid, Place You Can Visit Land Town CARDNAME enters the battlefield tapped
And you could also be speeding your own game up if the cards you exile are strong enough
I love that Wizards took a look at Volraths Stronghold and Academy Ruins and decided to add another card with a similar design
The versatility of Satoru Umezawa means that you can still draft it later in even if you didn't plan on making it a ninjutsu build
This is a pretty well known strategy by now, but in case you arent familiar, Merlin cards benefit you when they are played and when they are removed from play