Jegantha, the Wellspring (Halo Foil) [Multiverse Legends] Guilds of Ravnica Promos Set: History Pack 1 Finish:

Set: History Pack 1 Finish: Regular Type: Action Subtype: Attack Rarity: Majestic Class: Generic Power: 5 As an additional cost to play Enlightened Strike

It's found in the silence that follows

When Tergrid was a child

Set: Limited Edition Beta Type: Creature — Bird Rarity: Rare Cost: {G} Flying

(Leads to: Catacombs)

Jegantha, the Wellspring (Halo Foil) [Multiverse Legends] Guilds of Ravnica Promos Set: History Pack 1 Finish:Set: Multiverse Legends Type: Legendary Creature Elemental Elk Rarity: Rare Cost: {4}{R G} Companion No card in your starting deck has more than one of the same mana symbol in its mana cost. (If this card is your chosen companion, you may put it into your hand from outside the game for {3} any time you could cast a sorcery.) {T}: Add {W}{U}{B}{R}{G}. This mana can't be spent to pay generic mana costs.