best untap creature cards mtg Rules Text: untap, creature, 870 What cards/commander would you recommend

These cards both retail for around $7, and are cards I'd be thrilled to open from any Foundations Play Booster

Dark Knights Greatsword

Having Dictate of Erebos around means the opponent is sacrificing just as many creatures, and the opponent probably can't keep up for long

In many ways, this card calls back to Mother of Runes or Giver of Runes, giving access to a useful effect in both Standard and Pioneer

Will that be the case for our next ink, Emerald

Not only does the enchantment make a great impression through its drain-on-death ability, but when it enters play, it makes a creature token so that the ability has something to work with right away