Ghalta, Stampede Tyrant [The Lost Caverns of Ixalan] 138 Primordial Hydra has trample as

Primordial Hydra has trample as long as it has ten or more +1/+1 counters on it

As Overgrown Tomb enters the battlefield

Set: Secret Lair Drop Series Type: Creature — Ooze Rarity: Rare Cost: {2}{B}{B} As long as Necrotic Ooze is on the battlefield

Set: Secret Lair Drop Series Type: Instant Rarity: Rare Cost: {3}{U} Return all attacking creatures to their owner's hand

Ghalta, Stampede Tyrant [The Lost Caverns of Ixalan] 138 Primordial Hydra has trample asSet: The Lost Caverns of Ixalan Type: Legendary Creature Elder Dinosaur Rarity: Mythic Cost: {5}{G}{G}{G} Trample When Ghalta, Stampede Tyrant enters the battlefield, put any number of creature cards from your hand onto the battlefield. A thundering roar calls forth a primeval army.