3 Cherish Ball Cherish Ball is yet another strong card, only limited by the format, just like Dive Ball
During your opponent's turn, if you activate a Spell/Trap Card or effect while this card is in your GY (except during the Damage Step): You can Tribute 1 Spellcaster monster
Its going to make it a lot harder to play colorless lands like Field of Ruin, and its going to give us extra reason to consider filter lands like Mystic Gate
Upgrade 2 IN: Sovereign Okinec Ahau Another synergistic card for the counters side is Sovereign Okinec Ahau, as it can effectively double the number of +1/+1 counters on your creatures
If it's a permanent card, you may put it onto the battlefield
Preventing your Monsters from being affected by Monster effects makes this card plenty impressive on its own, but Flawless Perfection of the Tenyi also discourages your opponent from Special Summoning Monsters, by allowing you to draw two cards if they do so outside of the Damage Step