Achievement rule of five
Rule of 5 achievement:
Says to draft 5 or more copies of a card in a draft
I drafted 5 Plains but did not receive the achievement
(I obviously would not have drafted Plains cards if I knew this wouldn't work)
2
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Utgard-Valki's Cat#44637 commented
I completed the rule of five achievement by drafting 5 of the same artifact creature. Maybe it excludes lands or basic lands.