Defense of the Heart [Mystery Booster] Human Druid This ability can't cause the

This ability can't cause the total number of +1/+0 counters on Clockwork Beast to be greater than seven

Set: Arabian Nights Type: Creature — Human Wizard Rarity: Common Cost: {B}{B} {T}: Cuombajj Witches deals 1 damage to any target and 1 damage to any target of an opponent's choice

But where is the source

Set: Lorwyn Type: Creature — Elemental Incarnation Rarity: Rare Cost: {3}{B}{B}{B} Fear (This creature can't be blocked except by artifact creatures and/or black creatures

Defense of the Heart [Mystery Booster] Human Druid This ability can't cause theSet: Mystery Booster Type: Enchantment Rarity: Rare Cost: {3}{G} At the beginning of your upkeep, if an opponent controls three or more creatures, sacrifice Defense of the Heart, search your library for up to two creature cards, put those cards onto the battlefield, then shuffle.