Su-Chi
Artifact Creature — Construct
When this creature dies, add 
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Flawed copies of relics from the Thran Empire, the su-chi were inherently unstable but provided useful knowledge for Tocasia's students.
Christopher Rush
Masters Edition (ME1)
• #168Rulings
You get the mana whether you want it or not. If you don’t spend it, it will disappear at the end of the current step (or phase).
(wotc • 2009-10-01)
Rulings
You get the mana whether you want it or not. If you don’t spend it, it will disappear at the end of the current step (or phase).
(wotc • 2009-10-01)