Biorganic Carapace (SPM 124)

Artifact — Equipment • Mana cost: {2}{W}{U} • Marvel's Spider-Man • Rare

When this Equipment enters, attach it to target creature you control.
Equipped creature gets +2/+2 and has "Whenever this creature deals combat damage to a player, draw a card for each modified creature you control." (Equipment, Auras you control, and counters are modifications.)
Equip {2}

Illustrated by David Álvarez.