And while this may be a good thing in the context of clunky mechanics like Stickers, it also closes the door on a lot of other interesting design spaces
Thanks goes to Steffenka for compiling the set list for this story
Spend this mana only to cast a creature spell." Not bad, and certainly relevant in stompy Commander decks, but the real kicker comes in its other activated ability, which allows you to tap Herd Heirloom to grant a creature with power four or greater that you control trample and "Whenever this creature deals combat damage to a player, draw a card," until end of turn
(You may pay an additional 1U as you cast this spell.) Look at the top X cards of your library, where X is the number of lands you control
Thrasios, Triton Hero [Partner]: It's not about getting more lands if you are paying 4 mana to scry 1
With 64 options, thats 32,000 unique cards