For absentee bidders, return must be made within two weeks (14 calendar days) of receipt of property, providing written notice detailing the specific reason for return is given first within five (5) days of receipt of property, and providing that the property is in the same condition as when sold
Plenty of goblin decks care about the number of goblins you have out, especially ones built around Krenko, Mob Boss or Muxus, Goblin Grandee
Of course, you can also sink real money into the game too, to unlock specific sets or cards, as well as a premium battle pass - which provides more quests and unlockables - and to purchase accessories for your virtual trainer, from deck boxes and card sleeves to virtual clothing.
Grakmaw, Skyclave Ravager Like Verazol, Grakmaw wants to pick up +1/+1 counters from your other creatures
"Peten the Dark Clown" is a Spellcaster-Type monster