Dragons Crown

Indestructible Equipped creature has +3/+3
When Dragon Crown is equipped to a creature,
all creatures get +1/+1 counter equal to the
amount of +1/+1 counters equipped creature.
If you play this on a creature with power above
20 you win the game
{t}{8} Gem Blow: Take an extra turn after this
one and destroy five lands your opponents
control.