If Kozilek is countered or otherwise leaves the stack in response to that triggered ability, the triggered ability will resolve as normal
Even if you've only got a handful of weak pieces left while your opponent still has most of their army, if you capture the Flag, or if you bring your flag to their side of the board (and they can't challenge it on their next turn), you win
They also tend to pay life points to unlock their effects, while their synchro monsters specialize in gaining you those life points back (and then some!) Since then, a couple of psychic decks have actually made their way into the meta game
The new-to- Magic Jumpstart cards can be found in both Jumpstart Volume 2 boosters and Special Edition Collector Boosters, with extended-art versions exclusive to Special Edition Collector Boosters
Normally, my 5/5 deals 5 damage to your 3/3
Therefore, the biggest key to any multiplayer deck is the means to draw additional cards