Blood Drain. Melee Weapon Attack: +5 to hit, reach 5 ft., one creature. Hit:5 (1d4 + 3) piercing damage, and the mosquito attaches to the target. While attached, the mosquito doesn't attack. Instead, at the start of each of the mosquito's turns, the target loses 5 (1d4 + 3) hit points due to blood loss.
The mosquito can detach itself by spending 5 feet of its movement. It does so after it drains 10 hit points of blood from the target or the target dies. A creature, including the target, can use its action to detach the mosquito.
The black mana that brews and festers in Zendikar's swamps infuses a wide variety of natural animals, creating large, deadly vermin—rats, bats, insects, scorpions, and spiders that spread death and decay with their bites, stings, or caustic saliva. The swamps of Guul Draz are home to many such creatures, from the enormous heartstabber mosquitoes (best represented with stirge statistics) to giant scorpions large enough to hold a struggling vampire in one claw. The gigantic, ant-like…