Five mana is too expensive outside of some niche applications in Standard or Pioneer, and both of those formats dont have a lot of card advantage that actually draws cards
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It also will get you to delirium very quickly, and then, when you need, you can sacrifice it to pull back two cards from your graveyard as a double Regrowth
And Historic, apparently
You can find other recent Commander set reviews here: Thunder Junction Karlov Manor Lost Caverns of Ixalan Doctor Who Lord of the Rings: Tales of Middle-earth As always, were only looking at the all-rounders
Those are preorder driven numbers on cards almost nobody has opened yet, so expect real swings once packs hit the wild, but the direction is unmistakably up, and the Iconic tier is where Lorcanas biggest money now lives