This card can be included in a Ritual build for the "Red-Eyes" archetype, which can use "Advanced Ritual Art" to send "Red-Eyes B. Dragon" from the Deck to the Graveyard to Summon this card.
It's generally a good idea to only run only one "Gravity Dragon" since "Odd-Eyes Advent" can re-Summon it from the Graveyard, which helps preventing dead drawing it.
Since "Odd-Eyes Advent" can Summon this card from the Graveyard, it makes for a good discard card for cards like "Pendulum Call". It also makes for good Fusion fodder for Fusion Monsters that require an "Odd-Eyes" monster for a similar reason.
Combined with the above, this card works well with the effect of "Oafdragon Magician" of re-adding an "Odd-Eyes" monster from the Graveyard to the hand for a good supply of Fusion and discard fodder.