Sleeper's Ascension

Enchant Player.
On their upkeep, enchanted player must pay {3} or gain a poison counter. Then repeat this.
Spells enchanted player casts cost {1} less for every
2 poison counters they have.
Enchanted player draws an additional card on
their draw step for every 3 poison counters they
have.
"Their joy and liberation is to enter even-more-deeply
into the profound enlightenment of the divine
dreamworld." - Dagoth Ur