Creature - Rhino Soldier 4/4, 5W (6) Trample At the beginning of your upkeep, if you control a blue permanent, you may put a token that's a copy of Mirror-Sigil Sergeant onto the battlefield.1 "If I had many lives, I would give them all for Bant."
Illus. Chris Rahn
2/1/2009: The "intervening 'if' clause" means that (1) the ability won't trigger at all unless you control a permanent of the specified color, and (2) the ability will do nothing unless you control a permanent of the specified color at the time it resolves.
2/1/2009: Normally, when a token is created by this ability, it will simply be a Mirror-Sigil Sergeant, so it'll also have the token-creating ability. (See the other ruling for weird exceptions.) At the beginning of your next upkeep, if you still control the original Sergeant, the token copy, and a blue permanent, you'll get two more token copies; the turn after that you'll get four; then eight; and so on.
2/1/2009: Here's the detailed version of what happens. As the token is created, it checks the printed values of the Mirror-Sigil Sergeant it's copying -- or, if the Mirror-Sigil Sergeant whose ability triggered was itself a token, the original characteristics of that token as stated by the effect that put it onto the battlefield -- as well as any copy effects that have been applied to it. It won't copy counters on the Mirror-Sigil Sergeant, nor will it copy other effects that have changed Mirror-Sigil Sergeant's power, toughness, types, color, or so on.
2/1/2009: If Mirror-Sigil Sergeant has left the battlefield by the time its triggered ability resolves, you'll still put a token onto the battlefield. That token has the copiable values of the characteristics of Mirror-Sigil Sergeant as it last existed on the battlefield.
Conflux
(Mythic rare)