Old-Growth Troll [Kaldheim] Condition:Moderately Played Reverse Type: Sorcery — Adventure

Reverse Type: Sorcery — Adventure Search your library for a Doctor Card

or whatever extensive research you've done and can show that they're from that plane

Set: Explorers of Ixalan Type: Instant Rarity: Uncommon Cost: {B}{B} Target creature gets -3/-3 until end of turn

Bala Ged guide

Old-Growth Troll [Kaldheim] Condition:Moderately Played Reverse Type: Sorcery — AdventureSet: Kaldheim Type: Creature Troll Warrior Rarity: Rare Cost: {G}{G}{G} Trample When Old Growth Troll dies, if it was a creature, return it to the battlefield. It's an Aura enchantment with enchant Forest you control and "Enchanted Forest has '{T}: Add {G}{G}' and '{1}, {T}, Sacrifice this land: Create a tapped 4 4 green Troll Warrior creature token with trample.'"