Rock Hydra [Foreign Black Border] Ogre Shaman "When elephants fight it is

"When elephants fight it is the grass that suffers

This explains why the goblins remain unaffected

you may sacrifice Sanctum of Ugin

you may put Nether Shadow into play

Rock Hydra [Foreign Black Border] Ogre Shaman "When elephants fight it isSet: Foreign Black Border Type: Creature Hydra Rarity: Rare Cost: {X}{R}{R} Rock Hydra enters the battlefield with X +1 +1 counters on it. For each 1 damage that would be dealt to Rock Hydra, if it has a +1 +1 counter on it, remove a +1 +1 counter from it and prevent that 1 damage. {R}: Prevent the next 1 damage that would be dealt to Rock Hydra this turn. {R}{R}{R}: Put a +1 +1 counter on Rock Hydra. Activate only during your upkeep.