Karn, Silver Golem [Urza's Saga] Hydra Whenever a Dragon you control

Whenever a Dragon you control dies while Boneyard Scourge is in your graveyard

the Nurturer

Set: Amonkhet Prerelease Promos Type: Sorcery Rarity: Rare Cost: {2}{G} Search your library for up to X basic land cards

it's legendary in addition to its other types

Karn, Silver Golem [Urza's Saga] Hydra Whenever a Dragon you controlSet: Urza's Saga Type: Legendary Artifact Creature Golem Rarity: Rare Cost: {5} Whenever Karn, Silver Golem blocks or becomes blocked, it gets 4 +4 until end of turn. {1}: Target noncreature artifact becomes an artifact creature with power and toughness each equal to its mana value until end of turn.