If “Volcanic Slicer” is flipped face-down after its effect has been activated, and flipped-face up in the same turn, it can attack that turn.
“Volcanic Slicer’s” Life Point damage inflicting effect can be activated when another card effect is preventing “Volcanic Slicer” from attacking.
“Volcanic Slicer’s” Life Point damage inflicting effect can be used by the player taking the very first turn of the Duel, even though he/she does not have a Battle Phase.