mtg archive cards Secrets of Strixhaven Mystical Uncommon Hop to It #6 draw two cards instead. JP - Opt - Strixhaven:

What if cards came with a second spell that you could cast before the main spell

But the Doctor rarely travels alone, and Wizards of the Coast have elected to represent this by printing a slew of legendary creatures to represent his traveling companions, all with the aptly-titled mechanic Doctors Companion. While reminiscent of the Partner mechanic, Doctors Companion is a lot closer to the Background keyword from Battle for Baldurs Gate

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That's a baseline of eight mana of value, but can be so, so much more