Pact of Devotion

When this enchantment enters the battlefield, target player you adore becomes your partner in corruption. If they accept, you both gain:

"Infectious Affection" (Your love gives opponents -1/-1 counters in the form of jealousy.)
"Shared Phyrexia" (At the beginning of your end step, proliferate your bond.)
"Dark Ritual" (Add {b}{b}{b} to your mana pool for date-night activities.)

"The only compleation I crave is yours."