So if you have 10 creatures on your board, you can pay just to put in your hand 7 of your cards and if they happen to be instants or sorceries, Witherbloom will discount them too, of course
Alpha Guard Captain Rex Nebula Carnival Barker Complaints Clerk Deadbeat Attendant Dee Kay, Finder of the Lost Discourtesy Clerk Goblin Airbrusher Goblin Blastronauts Goblin Girder Gang Icing Manipulator Jetpack Janitor Monitor Monitor Monoxa, Midway Manager Park Bleater Petting Zookeeper Quick Fixer Rad Rascal Resolute Veggiesaur Ride Guide Roxi, Publicist to the Stars Scampire Seasoned Buttoneer Soul Swindler
Other sets may not have a heavy knight theme but still feature powerful individual knightslike Wight of the Reliquary in Modern Horizons 3
There is a way to template the ability so that it technically reads a little more blue (for example, instead of preventing the casting, it could allow it and then counter it) but it would just have been significantly wordier and would have had the same basic effect
Each player who does draws seven cards
Thats why I stressed the many other themes you can build into a discard deck before getting to this one
