When this leaves the arena, create a Spectral Shield token, then if you control no other Illusionist auras, put a +1{p} counter on it.
Ward 4 (If you would be dealt damage, destroy this to prevent 4 of that damage.)
When this leaves the arena, if you control no Illusionist auras, the next time you would be dealt damage by a yellow source this turn, prevent it.
Ward 2 (If you would be dealt damage, destroy this to prevent 2 of that damage.)