FromTheShire: I'm absolutely mad for Planechase Commander, so seeing built in support in the precon decks is awesome
Once Oblivious Bookworm's ability begins to resolve, it's too late to put any permanents onto the battlefield face down under your control or turn any permanents face up to prevent yourself from having to discard a card if you choose to draw a card
Some creatures like Agent of Treachery are bad enough when you get hit by their ETB once, but you can easily use them again and again while also jumping ahead on lands to drop other powerful cards
Ignore questing or challenge, their ability to ready still leaves singing and using abilities
Light-Paws offers the gift of flickering, allowing you to momentarily exile a creature only to have it return, retriggering all its delicious enter-the-battlefield effects
Self-Destruct Oh, Gilgamesh, you will always be remembered as a hero