Players sometimes dont even realise there are more rarities Ive seen players say there are only really three rarities, and Mythic rares are a subtype of rare
In this case you are playing a card and discarding a card to draw 2 cards which is a net of 0
Zorua is classified as a 1-Star Shiny card in the Mega Shine set
Functionally, Yuna's Whistle is a pseudo-cantrip that always replaces itself with a creature, and finding the creature gives you some +1/+1 counters too, so there's combat trick potential as well
Pack your deck full of blink effects so you can keep digging for the biggest hitters (and double up on all THEIR ETB triggers)
But the traditional experience of playing a TCG can only come from engaging with other people in your community folks who might have different cards, different decks, and different strategies that youre not familiar with