Primordial Hydra (Duels of the Planeswalkers Promos) [Duels of the Planeswalkers Promos 2013] Scariest Creature You'll Ever See it gets +1/+1 until end

it gets +1/+1 until end of turn

They likely refer not to one mage

"The bigger they are

Set: Champions of Kamigawa Type: Legendary Land Rarity: Rare {T}: Add {W}

He watches from below

Primordial Hydra (Duels of the Planeswalkers Promos) [Duels of the Planeswalkers Promos 2013] Scariest Creature You'll Ever See it gets +1/+1 until endSet: Duels of the Planeswalkers Promos 2013 Type: Creature Hydra Rarity: Mythic Cost: {X}{G}{G} Primordial Hydra enters the battlefield with X +1 +1 counters on it. At the beginning of your upkeep, double the number of +1 +1 counters on Primordial Hydra. Primordial Hydra has trample as long as it has ten or more +1 +1 counters on it.