Death Defiant: Mechanics

Immortal: This card is hexproof and does not take combat damage from any source. Used on 9 cards: Caraval, Defiant Knight, Emissary of War, Emissary of Death, Emissary of Peace, Emissary of Nature, Emissary of Mind, Life Tinker, Nature Spirit, False Immortality

There is a loophole to kill creatures with this mechanic. AoE spells will do well against these cards.

In card text or details pages, write the mechanic's code name (playtest name) between square brackets, like "[Crittercast]", "[Bushido 1]" or "[Delay 4 {2}{R}{R}]". It will be expanded to the mechanic's name plus reminder text, such as "Suspend 4 – {2} {r} {r} . (Rather than cast this spell from your hand,...)"
To expand a mechanic's name but not its reminder text, include parentheses at the end of the square brackets: "[Crittercast()]", "[Delay 9 {R}()]".