Made with a soft fabric top and a non-slip rubber backing to reduce damage to cards and keep the playmat in place
You choose whether to cast a Hero spell from your hand as West Coast Expansion resolves

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Returning to Middle-earth with Universes Beyond Mark discusses how Magic returned to Tolkien's world and reveals a new card from Magic: The Gathering | The Hobbit
It isn't an additional cost
A: Other than the obvious difference in the trigger condition , the trigger effects are the same with an extra "may" slipped in