The true benefit is the power to forge meaningful emotional connections
This process can be costly, but it is worth it if you think your card could be worth a lot of money in the future
For the Unlimited print run, the trainer cards tend to appear on the sheets fewer times than the Pokmon when there are non-artificial rarity differences, and on the Unlimited holos sheet, the final evolutions of the starter Pokmon as well as the four holos appearing in the theme decks are among those appearing once fewer
The last ability triggers only once for each time cards are put into exile from your library and/or graveyard, no matter how many cards were exiled at the same time
(Unless you're Ken Nagle, in which case you do it right to left.) However, there's an important distinction to make here: you need to see what you're actually going to want to cast at each mana cost, not what you can cast at each mana cost