This card may not have the ceiling that some other cards on this list do, but it has a very high floor, since it almost always kills something important and leaves behind a body as a bonus
BT3-093 R Tamer Davis Motomiya Color Blue Cost 4 Card Text 1 [Effect] [Start of Your Turn] If you have 2 memory or less, set your memory to 3
Even with new strategies like BlackWarGreymon that could delete Tamers easily, these decks still edged out the competition through their more defensive tactics (and subsequently received further hits in the ban list)
You can even attack in a turn and cast it to defend in the next one, killing a few aggressors and gaining life
While most people were focused on the Lions Eye Diamonds and Lotus Vales of the world, Flash quietly picked up errata that basically made it so that you couldnt just pick a creature and not pay for it, so that you could do the enters the battlefield trick which was the exact trick the card was originally designed to allow for (albeit, long before they conceived of just how big of design constraints this could put on them in the future if they changed the types of creatures they made)
