Can special summon himself from the Spell/Trap zone.
Usually only good as a Synchro material or tribute fodder.
Low-leveled Dragons are used as equips in a Dragunity deck where they will give additional support to the monster that equipped them. Here are the Dragunity monsters that can equip use them as equip cards.
If used as an equip card, Dragunity Phalanx can special summon himself. You can then use him with the monster that equipped him to Synchro summon.
Use Dragunity Legionnaire to special summon Dragunity monsters that are used as Equip cards. You can also use Dragunity Legion to equip Dragunity monsters on your field with Dragunity monsters in your graveyard.
Dragunity Divine Lance gives the equipped Dragunity monster an attack boost and makes it immune to Trap effects. You can also use Dragunity Divine Lance to search out any Dragunity monster from your deck and equip it to your monster.
Cyberdarks are able to equip level 3 or lower Dragon-type monsters from your graveyard to themselves which fits in with the Dragunity strategy. You can equip Dragunity Phalanx and then special summon him to Synchro summon into a level 6 monster.
Special Summons itself from your Spell & Trap Card Zone
Without Dragon Ravine or spells to send phalanx to grave is hard to use dragunity, because you need send phalanx to grave to begin your game with Dragunitys. And 5 cards in extra deck sucks, (8-10 cards in extra is the minimal to most synchro decks become playable to meta).