Cards like Rivalry

Copper Tablet88%

$56.19↑#15887↑0.2533.2 years↑

"At the beginning of each player's upkeep, this artifact deals 1 damage to that player."

burn-player-each, pinger, symmetrical

Mask of Intolerance86%

$0.30↓#304790.3125.4 years↓

"At the beginning of each player's upkeep, if there are four or more basic land types among lands that player controls, this artifact deals 3 damage to that player."

burn-player-each, symmetrical, burn-you

Rumbling Slum86%

$0.25↓#270680.06↓20.7 years↓

"At the beginning of your upkeep, this creature deals 1 damage to each player."

burn-player-each, pinger, burn-you

Oath of Mages86%

$0.48↑#246360.11↓28.3 years

"At the beginning of each player's upkeep, that player chooses target player who has more life than they do and is their opponent. The first player may have this enchantment deal 1 damage to the second player."

catch-up, pinger, symmetrical

Power Surge84%

$1.09↑#11693↑0.17↓33.2 years↑

"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."

burn-player-each, symmetrical, burn-you

Barbed Wire82%

$1.36↑#13927↑0.17↓27.0 years

"At the beginning of each player's upkeep, this artifact deals 1 damage to that player."

burn-player-each, pinger, symmetrical

Furnace Punisher79%

$0.08↓#214980.10↓3.7 years↓

"At the beginning of each player's upkeep, this creature deals 2 damage to that player unless they control two or more basic lands."

burn-player-each, pinger, symmetrical

Roiling Vortex78%

$1.36↑#2588↑0.54↑6.1 years↓

"At the beginning of each player's upkeep, this enchantment deals 1 damage to them."

burn-player-each, pinger, symmetrical

Impatience78%

$0.29↓#231590.2527.4 years

"At the beginning of each player's end step, if that player didn't cast a spell this turn, this enchantment deals 2 damage to that player."

burn-player-each, pinger, symmetrical

Antagonism78%

$0.41↑#258600.1828.0 years

"At the beginning of each player's end step, this enchantment deals 2 damage to that player unless one of their opponents was dealt damage this turn."

burn-player-each, pinger, symmetrical

Razor Pendulum78%

$0.55↑#304710.05↓30.0 years↑

"At the beginning of each player's end step, if that player has 5 or less life, this artifact deals 2 damage to that player."

burn-player-each, pinger, symmetrical

Flame Rift78%

$0.33↓#4030↑0.2826.7 years

"this card deals 4 damage to each player."

burn-player-each, symmetrical, burn-you

Citadel of Pain78%

$3.67↑#6850↑0.61↑26.4 years↓

"At the beginning of each player's end step, this enchantment deals X damage to that player, where X is the number of untapped lands they control."

burn-player-each, symmetrical, burn-you

Land Tax78%

$16.81↑#356↑0.83↑32.4 years↑

"At the beginning of your upkeep, if an opponent controls more lands than you, you may search your library for up to three basic land cards, reveal them, put them into your hand, then shuffle."

opponent-land-count-matters, catch-up

Spiteful Repossession78%

$0.37↑#13486↑0.12↓4.5 years↓

"this card deals damage to each opponent who controls more lands than you equal to the difference. Then create a number of Treasure tokens equal to the damage dealt this way."

opponent-land-count-matters, catch-up, group-slug