There are some appealing cards here for the Toxic Twobert, and Radstorm is, well, rad
These are effects that pretty much show up in every set in common in a particular color: White White always has some kind of lifegain, enchantment removal, and creature removal (which can include Blue Blue always has a counterspell (often two, one hard, one soft), "bounce" ("return BLAH to its owner's hand"), card drawing, creature-control enchantment (most often locking it down), and sometimes has a card sifting, shrinking ("target creature gets N/-0 until end of turn"), or twiddling ("tap or untap target BLAH")
Legendary Creature - Human Ranger Draw (CTRL to add secondary) Land Destruction Land Destruction (CTRL to add secondary) Landfall Springheart Nantuko Bestow Enchanted creature gets +1/+1
Players cant cast noncreature spells from exile: This is probably the most important, and also most unique, ability on Soulless Jailer
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If some other player has some engine out that doesnt involve creatures, they love this plane and want to stay here forever while everyone else is scrambling to roll the planar die as fast as they possibly can