Generally, the Deck will try to tutor out "Sacred Garunix" and use its effect multiple times over multiple turns, destroying "High Avatar Kirin" from the Deck each time for massive advantage
For starters, its effect lets every single player draw a card
You can only use this effect of "Megistric Maginician" once per turn

2 Prometeoron the Burning Comet 3 Hieratic Dragon of Nuit 1 Flamvell Guard 1 Dragon Core Hexer 3 Blue-Eyes White Dragon 1 Blue-Eyes Alternative White Dragon 3 The White Stone of Legend 1 Jet Synchron 1 Lee the World Chalice Fairy 1 World Chalice Guardragon 2 Destrudo the Lost Dragons Frisson 1 Darkest Diabolos, Lord of the Lair 2 Gameciel, the Sea Turtle Kaiju 3 Mausoleum of White 3 World Legacy Guardragon 1 World Legacy Succession 3 Dragon Shrine 3 The Melody of Awakening Dragon 2 Trade-In 2 Hieratic Seal of Convocation 1 Burst Stream of Destruction 1 Terraforming 2 Fists of the Unrivaled Tenyi 1 Phantasmal Lord Ultimitl Bishbaalkin 1 Ib the World Chalice Justiciar 1 Martial Metal Marcher 1 Vermilion Dragon Mech 1 Crystron Glassfiber 1 Qliphort Genius 1 Linkuriboh 2 Link Spider 1 Saryuja Skull Dread 1 Pentestag 1 Blacktrack 1 Knightmare Cerberus 1 Number 23: Lancelot, Dark Knight of the Underworld 1 Number 38: Hope Harbinger Dragon Titanic Galaxy [Deck Commentary] A Phantasmal Lord Ultimitl Bishbaalkin Deck featuring Prometeoron the Burning Comet from Chaos Impact

It's not a great Pokmon in itself, but what's awesome about it is, if you managed to stick a Poke Tool onto it, you can use Sweets Relay for free
That would totally defeat the purpose of the mechanic