A creature that enters the battlefield face up and turns face down later in the turn won't cause Tunnel Tipster's first ability to trigger
The controller wants to defeat the Siege, because once the Siege's last defense counter is removed, it is exiled, and its controller gets to play its reverse face for free
They are fun, but ruin the game
Many of those cards are Counter Events, which well use to Counter attacks and lower the number of cards in our deck
This allows blue decks to find answers to any situation and stop opponents from executing their own winning strategies
There are a lot of accessories that they sell as well, from Playmats to Sleeves, so it's always worth checking in and seeing if you can pick up some Japan limited items