Chandra, the Flame mage

0: add X red mana to your mana pool, then put X loyalty counters on Chandra, the Flame mage.
X: X creatures get -X/-X, then put an extra -1/-1 counter on the most powerful one.
-10: each opponent gets an elblem with: "Each turn, when a creature get's a -X/-X couter, put a loyalty counter on chandra & deals 1 damage to them.