Once we had Priest of Titania creatures, it seemed natural to have Priest of Titania spells: (Wirewood Pride, for example was called "Giant Growth of Titania" in design.) The one-shot spells then led to permanents that trigger a tribal effect: Its interesting to note that Elvish Guidance got created because we wanted to find some way to get the Priest of Titanias effect into the set
But don't worry if you're the one flying solothe one player has a special deck of twisted schemes at their disposal
Having more than one way to win can make your deck more reliable (that is my opinion, it may not be true)
It can be used at instant speed and circumvents most counterspells or stax pieces because you are not casting the cards
This ability can really hamper the early games plans of anyone or a number of players use of mana rocks, and even though they get to choose, I still think this is better than getting three squirrels
If you cast the Aftermath half, the exile part of its abilities will apply