You can tap any untapped creature you control rather than pay a mana in the activation cost of Heirloom Epic's ability, even one you haven't controlled continuously since the beginning of your most recent turn
However, to give an extreme example, if I sell a Pikachu Illustrator card today (only 41 exist globally), I might have to wait months or even years for another chance to buy it back
You can find a good (and quite funny) video on YouTube by Wizards of the Coast's Gavin Verhey below to learn how to pronounce it with a little help from Ethan Fleischer
Without Lumineon V, decks will have to turn to alternatives like Noctowl-based draw engines to ensure consistency
Example (for the same set of decks as before, but using the "mean" and "median" measures, respectively): - using mean (seems the best option, so it is now the default) - using median I'm not so worried about combo decks as I am worried about "synergy decks"