In the right deck, you can ultimate him the turn he comes down
That format has infinite mana of any type, but is limited to just one spell per turn, barring an alternate cost being paid like Force of Will
This also applies if you have more than one Bystial, in case they can disrupt the other one(s)
:) And for the Legendary Dragons fans

3 Silent Woobie 2 Aquaactress Arowana 3 Gizmek Inari, the Rice Rocket Reynard 2 Gameciel, the Sea Turtle Kaiju 2 Jizukiru the Star Destroying Kaiju 2 Aquarium Stage 1 Aquarium Lighting 3 Interrupted Kaiju Slunber 3 Wetlands 1 Terraforming 3 Aqua Story Urashima 1 Metaverse 1 Aquamirror Cycle 1 Puzzlomino, the Drop-n-Deleter 2 Marincess Coral Anemone 1 Crystron Halqifibrax 1 Eria the Water Charmer, Clear 1 Underclock Taker 1 Mistar Boy 1 Marincess Marbled Rock 1 Marincess Great Bubble Reef 1 Formula Synchron 1 Crystron Quanax 1 White Aura Whale 1 Graydle Dragon 1 White Aura Bihamut 1 Toadally Awesome Water Dragon is ideal to destroy with the effects of Dragonic Diagram and True Kings 3 Water Dragon 1 Water Dragon Cluster 1 Souleating Oviraptor 3 Hydrogeddon 3 Oyxgeddon 3 Duoterion 3 Petiteranodon 2 Babycerasaurus 3 True King Bahrastos, the Fathomer 3 True King Lithosagym, the Disaster 3 Crystal Girl 3 Card Trooper 2 Fossil Dragon 1 Bonding H2O 1 Bonding D2O 1 Dragonic Diagram 1 Lost World 1 Terraforming 1 Bonding DHO 1 Torrential Tribute 2 Evolzar Laggia 1 Primathmech Laplacian 1 Dingirsu, the Orcust of the Evening Star 1 Number 38: Hope Harbinger Dragon Titanic Galaxy 1 Divine Dragon Knight Felgrand 1 Galaxy-Eyes Cipher Dragon 1 Galaxy-Eyes Full Armored Photon Dragon 1 Black Luster Soldier Soldier of Chaos 1 Daigusto Emeral 1 Union Carrier 1 True King of All Calamities 1 Reprodocus 1 Mistar Boy 1 Missus Radiant

These cards are like trophies that marked the earliest era of Pokmon as a tournament sport