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The first costs two mana to put a card of your choosing onto the top of your library, which is great

Marina Vendrell's Grimoire I'm sure Marina Vendrell's Grimoire is broken somewhere, but it's hard to image a world where this doesn't make it easier for your opponents to kill you

On one card, New Prahv Guildmage, Detain was actually a mana ability costing five mana to activate

With regenerate, you can always protect Ink-Eyes from destruction and keep landing those devastating hits

If you have loads of burst mana and high impact threats then you will either do nothing or auto win

For these reasons, we can assume that this is just flavor text on a reprint