You can Tribute a Trap Monster like “Embodiment of Apophis” for this effect, but no damage will be inflicted.
If you have already activated a Spell Card, you cannot activate "Linear Accelerator Cannon" on the same turn.
You can Tribute a Trap Monster like “Embodiment of Apophis” for this effect, but no damage will be inflicted.
If you have already activated a Spell Card, you cannot activate "Linear Accelerator Cannon" on the same turn.