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The way challenging works is a ready (untapped) character exerts and chooses an opposing exerted character to challenge, and then both cards compare their strength (attack) and willpower (defense) values to each other (meaning the attacker automatically gets hit back by the defender)
It makes plenty of sense that drawing would be a major staple of Niko's toolkit, as luck isn't needed for someone who resists fate.
Although the Astral Radiance set only goes up to 189 cards on its setlist, the expansion has a ton of secret rare cards that bring its total to over 200
Esika, God of the Tree makes itself a surprisingly affordable 3 drop by being a double-faced card with a 5 color mana cost on the back
Introduced with the Scarlet & Violet expansion, cards of this rarity feature alternate artwork of a Pokmon ex or a Full Art Supporter Trainer card