Text (DK+errata): 2/2. ; {G}{G},{Tap}: ~this~ deals damage equal to its power to target creature. That creature deals damage equal to its power to ~this~. [Oracle 1999/07/23]
Giving him First Strike does not affect his ability. [bethmo 1994/08/29]
The amount of damage done in both directions is determined when the ability resolves. You check the power of each creature on resolution. [DeLaney 1998/10/20]
If Tracker leaves play before his effect resolves, the target creature is still damaged using the power it had right before it left play. [DeLaney 1998/10/20]
If the target creature leaves play before the effect resolves, then the ability is countered. [D'Angelo 1999/08/01]
Extended tournaments (see Rule 913) have banned this card since 1999/10/01.
Note - This card was creature type "Tracker" until Oracle 2007/10/01, when it became "Human".
