You can play this card instead of a major hero this round. Exhaust a friendly major hero Seeker to put Tao from your legendary hero pile into zone 1. The exhausted Seeker doesn't ready at the start at the next round.
This card was a prize given out at the Huntik National Championships in 2009. From what is known, only 120 were ever made. They were given out as follows:
Great Britain National Championship - Top 32 competitors
Italy National Championship - Top 32 competitors
Germany National Championship - Top 32 competitors
Benelux National Championship - Top 8 competitors
New Zealand National Championship - Top 8 competitors
Austalia National Championship - Top 8 competitors