Let's say a store is running an event in which the prizes are boosters from the current set
For a taste of just how much you can mess around with evoke triggers, check out Jesse Barker Plotkin's piece on getting the most out of cards like the Maw, Grief, and Fury with Undying EvilUndying Evil and its ilk
Once the ability resolves, the bonus applied by that instance of the ability doesn't change even if the number of permanent cards in your graveyard changes
There will be many a player who is looking forward to the Biogenic Ooze
Rest in Peace, Deathrite Shaman, Abrupt Decay, Ethereal Armor, Chromatic Lantern: all cards with significance in eternal formats, all cards that debuted right here in Return to Ravnica
A new ramp piece that can also do a good impression of Elvish Piper, $29.99 is maybe slightly high for this card, but it is still pretty cool if youre playing with enchantments