Whenever a source you control deals damage to you, put that many +1/+1 counters on Auntie Blyte, Bad Influence.
{1}{R}, {T}, Remove X +1/+1 counters from Auntie Blyte: It deals X damage to any target.
2 /
2
{2}{R}
Descent into Avernus
Enchantment
At the beginning of your upkeep, put two descent counters on Descent into Avernus. Then each player creates X Treasure tokens and Descent into Avernus deals X damage to each player, where X is the number of descent counters on Descent into Avernus.
{X}{R}
Earthquake
Sorcery
Earthquake deals X damage to each creature without flying and each player.
{3}{R}
Manabarbs
Enchantment
Whenever a player taps a land for mana, Manabarbs deals 1 damage to that player.
{1}{R}
Roiling Vortex
Enchantment
At the beginning of each player's upkeep, Roiling Vortex deals 1 damage to them.
Whenever a player casts a spell, if no mana was spent to cast that spell, Roiling Vortex deals 5 damage to that player.
{R}: Your opponents can't gain life this turn.
{X}{R}
Rolling Earthquake
Sorcery
Rolling Earthquake deals X damage to each creature without horsemanship and each player.