Targoroth, The Maw of Hell

During each players upkeep, that player adds culmative {r}. If a player would lose unspent mana, they are dealt x damage, where x is equal to the amount of mana lost this way.
{x}{r}{r}: Create x treasure tokens.
"Some call it 'the pit' or 'rakdos's mass grave'. Me? I call it 'Home'."
-Nektraz, Rakdos agent