This card card can make summoning "Thunder End Dragon" and "Neo Galaxy-Eyes Photon Dragon" a lot easier. Summon "Dragard" to Special Summon 1 Normal Monster with 1000 ATK or lower and then tribute "Dragard" itself to make the Normal Monster Level 8.
Summon this card, use this card's effect to Special Summon "Hieratic Seal of the Sun Dragon Overlord" from your Graveyard. Then Tribute itself and target another Monster to make that Level 8. Finally, Overlay those 2 Monster for easy Xyz Summon Rank 8 Xyz Monster.
If you control any Hieratic effect monster (save a few exceptions), Summon this card and use its first effect to get "Hieratic Seal of the Sun Dragon Overlord" from the Graveyard. Then Tribute the effect Hieratic to make this card a Level 8. Use the effect of the tributed Hieratic to summon a Level 8 normal monster and Xyz summon "Neo Galaxy-Eyes Photon Dragon" (without the negating effect).
If the effect Hieratic is "Hieratic Dragon of Nuit", Tribute this card to make it Level 8 since targeting it will trigger its effect to Summon a Normal Dragon.
"Influence Dragon" can allow you to Tribute any monster for this card's second effect. A likely choice would be the monster summoned by its first effect as there are only 7 monsters in the game which fit the criteria for both effects. (Six Normal Dragons and the Gemini "Hieratic Seal of the Dragon King").
If you want to use this card's first effect again, send this card to the Graveyard by Tributing itself for its second effect and return it to your hand with cards like "Genesis Dragon" or "Divine Dragon Apocralyph".
You can increase one of your Normal Monsters to Level 8, so that you can have a valid requirement for "Champion's Vigilance".