yugioh structure decks release dates HERO Strike Deck | Yu-Gi-Oh! Wiki LOOK: Here's the updated set

Since Oko, Thief Of Crowns only costs three mana, you can start taking advantage of it right away

[1] If this card is Normal or Special Summoned: You can destroy 1 other FIRE monster in your hand or face-up field, and if you do, add 1 FIRE Beast, Beast-Warrior or Winged Beast from your Deck to your hand, except "Fire King Avatar Princess Urkanix", then you can make this card become the same Level as the added card

Communication and acceptance is the true key to long-term health.

The key difference for Mother of Runes is that it can protect itself, which means that an untapped Mother of Runes without summoning sickness is difficult to deal with