Peacocks text box suggests two deckbuilding avenues: first, artifacts that youd want to sacrifice for a benefit (other than the Clue draw a card ability), and second, you want creatures that give you a benefit by being unblockable (other than just smashing life totals)
C Common Metalfoes Vanisher X FIRE Level 9 [ PsychicPendulumEffect ] ATK 2900 DEF 1900 P Scale 1 If a monster(s) you control is destroyed by card effect (except during the Damage Step): You can add 1 "Metalfoes" card from your GY to your hand, except "Metalfoes Vanisher"
You can upgrade the deck with some pretty inexpensive cards and improve it a lot
SPONGEBOB SECRET LAIR BONUS CARD: SMOTHERING TITHE Speaking of which, the next card on the list is another Secret Lair bonus card
Are Time Counters Used Anywhere Else
I don't think it's anything close to being a staple in the vast majority of decks, but it just needs a lot of testing to see which decks benefit from it and, more importantly, how to use it and play against it in those decks
