Flame Blitz

At the beginning of each end step, if you put a counter on a creature this turn, this enchantment deals 2 damage to each opponent.

Enchant player

At the beginning of enchanted player's upkeep, this Aura deals 1 damage to that player or a planeswalker that player controls.

At the beginning of each player's upkeep, this enchantment deals X damage to that player, where X is 4 minus the number of cards in their hand.

When Oath of Chandra enters, it deals 3 damage to target creature an opponent controls.

At the beginning of each end step, if a planeswalker entered the battlefield under your control this turn, Oath of Chandra deals 2 damage to each opponent.

At the beginning of your end step, target enchantment deals damage equal to its mana value to its controller unless that player sacrifices it.

At the beginning of each player's upkeep, this enchantment deals X damage to that player, where X is the number of untapped lands they controlled at the beginning of this turn.