This shadowless card commands over $300 on the market, and Pikachus overwhelming popularity is surely a major reason why
In terms of card quality, you'll bump into the following: Near Mint Lightly Played Moderately Played Heavily Played Damaged Buying a "Near Mint" quality card from TCGplayer does not mean that it will grade a PSA or CGC 10
The real power comes when you attack with a flying creature
You can cycle a card even if it has a triggered ability from cycling that won't have a legal target
Meanwhile, I adore Into the Unknown. Not only is that a killer song from Frozen 2, its an excellent low-end removal tool that Sapphire/Amethyst really does need to keep up the pace, preventing foes from getting too far ahead before you have a chance to ramp up to your bigger plays
It's a powerful ability by itself, but the fact it has flash means you can interrupt an opponent's tutor to search for a card you want to use instead