Put a tide counter on Tidal Influence when it is brought into play and during your upkeep. If there is one tide counter on Tidal Influence, all blue creatures get -2/-0. If there are three tide counters on Tidal Influence, all blue creatures get +2/+0. When there are four tide counters on Tidal Influence, remove them all. You may not cast Tidal Influence if there is another Tidal Influence in play.
FE • ENTom Wänerstrand
™ & © 1993—1994 Wizards of the Coast
Legal in: Legacy,Vintage,Commander
Oracle Text (click to copy):
View this MTG card on Gatherer
10/4/2004 As soon as the number of counters on this card changes, so does the power of blue creatures.