You can Special Summon it from your hand or GY by sending 1 D/D Monster or Dark Contract from your hand or field to the GY but it will get banished when it leaves the field It is most of the time used together with Loading
The key here is to not squeeze the sides of the top loader too hard otherwise you risk snapping the top loader into a U shape therefore possibly bending your card
Damage removed due to regeneration is still dealt with, though
Furthermore, this fusion spell, Branded Fusion, is a magnet for Ash Blossom & Joyous Spring, so it often does not resolve effectively
Enough effects that do a damage to everyone or every opponent, like End the Festivities and Creeping Bloodsucker, and your 1-drop 1/1s enter as 4/4s
This ability can be played both as an actively-aggressive ability or passively for defense, because every time a die is rolled Vrondiss may deal 1 damage to itself, so