First printed in Rise of the Eldrazi (2010)
Creature — Hydra
This spell costs 
less to cast for each green creature you control.
Trample
"In ages past, bargains were struck and promises were made. Now we must collect on our debt. Begin the hymns."
—Moruul, Khalni druid
8/8
- Illustrated by
- Todd Lockwood
Khalni Hydra legality
- Legal in
- Modern, Legacy, Vintage, Penny Dreadful, Commander, Duel Commander, PreDH, Oathbreaker
- Not legal in
- Standard, Pioneer, Pauper, Future Standard, Historic, Timeless, Alchemy, Premodern, Old School 93/94, Gladiator, Pauper Commander, Tiny Leaders, Brawl, Standard Brawl, Competitive Brawl
Rulings (3)
- If an effect (such as the one from Lodestone Golem) imposes an additional generic mana cost to casting Khalni Hydra, the Hydra's ability will reduce it too. It'll reduce the amount of green mana you need to spend first, though.
- For the purpose of determining the cost reduction, the number of green creatures you control is checked as you cast Khalni Hydra, before your last chance to activate mana abilities to pay for it. For example, if you control Wild Cantor (a red and green creature with the ability "Sacrifice Wild Cantor: Add one mana of any color.") as you cast Khalni Hydra, first the cost to cast Khalni Hydra is reduced by , then you could sacrifice Wild Cantor for mana to help pay for it.
- Khalni Hydra's cost reduction effect doesn't change its mana cost or mana value.
Prices
Paper price: €8.64 / $13.49 , the cheapest non-foil print (Cardmarket, and TCGplayer, otherwise Mana Pool or Card Kingdom, through MTGJSON, 8 Nov 2026).
MTGO price: 0.007 TIX, the cheapest non-foil print (average sell price on GoatBots, 8 Nov 2026).