Ward Gates appeared in Blood Omen 2. They were devices used by the Sarafan in their ceaseless war against the vampires.
Powered by (and likely formed from) green Glyph Energy [BO2], they prevented vampires moving freely through Meridian's streets, although they would not stop humans from passing through. If a vampire touched an activated Ward Gate, it would repel them and burn them as if it was a wall of fire.
Kain first saw a Ward Gate in the Slums, while Umah was training him. Later Kain was separated from her when a Glyph Guard turned on a Ward Gate between them. Kain had to turn off or avoid many Ward Gates while he was travelling through Meridian. Notably, he had to kill a nobleman called Artemis in the Sarafan Keep before a woman would open a Ward Gate for him.
- [BO2] Umah: "I spoke before of our mortal enemies, the Sarafan. It is their sworn crusade to destroy all vampires, and for this they have developed special defences. You see here a Ward Gate."
Kain: "What precisely does it do?"
Umah: "Should you so much as touch it, you will be burned as by fire. The Sarafan have raised these wards throughout Meridian. We can go no farther this way."
- [BO2] Cabal Woman to Kain: "The Ward Gate will not be opened until that man is dead, I promise you. His name is Artemis. You will know him by his blue cloak. When he is dead - when his lying tongue has been stopped - I will open this gate, and not before."