yugioh 5ds world championship 2011 elemental hero deck Pure Deck. Write up in the comments. : r/DuelLinks Divine Neos Deck? - Yu-Gi-Oh!

Its been a big finisher in the format since the formats inception, offering a way for creatures to avoid removal, swing in, and get around blockers

7 Mirri, Weatherlight Duelist You Decide How Combat Is Going Mirri, Weatherlight Duelist makes it so that each opponent can only block with one creature when she attacks or only attack you with one creature when she's tapped, making it difficult for your opponent to prevent and deal damage

current 210-240 = +50-71% ROI

The possibility of opening a pack and finding a rare card pulls a similar psychological lever as putting money into a slot machine

You cant play it in an aristocrats deck though since it needs to receive damage, so its a fine blocker at best