Even though its convoke cost means it's a little harder to pull off if you're already going wide with a full board of creatures, being able to flash it into play at any moment can come in clutch during board wipes or if you need to keep a commander alive for another round
Both these cards are old and won't be reprinted and while they're not needed in order to have a successful Shrine deck, having them will boost the power of the deck substantially
Not only is the art on this Mickey card absolutely gorgeous, but the card's effect is a great way to stun your opponent's characters to prevent them from questing next turn, making it a central part of Emerald's game plan
Marvel, Kamala Khan Overbeing of Myth Psychosis Crawler Robobrain War Mind Sage of Ancient Lore Soramaro, First to Dream Sturmgeist Sylvan Yeti Syr Elenora, the Discerning Tishana, Voice of Thunder
Aetheric Amplifier $11.41 Plan A of Aetheric Amplifier is clearly to double the energy counters you have