Vigilance
Hydra spells you cast cost less to cast.
Whenever a creature you control becomes the target of a spell, Gargos, Vicious Watcher fights up to one target creature you don’t control.
Gargos's cost-reduction ability applies only while it's on the battlefield. Gargos doesn't reduce its own cost.
12-07-2019
wotc
If a spell has {X} in its mana cost, you choose the value for X before applying cost reductions. For example, if you cast a Hydra spell with mana cost {X}{G}{G} and choose for X to be 6, you pay {2}{G}{G}. Any of that Hydra's abilities that refer to X still uses 6 as the value for X regardless of what you actually paid.
12-07-2019
wotc
Gargos's cost-reduction ability affects only generic mana in a Hydra's cost. For example, if you cast a Hydra spell with mana cost {2}{G}{G}{G}, it will cost {G}{G}{G} to cast, not {G}.
12-07-2019
wotc
Gargos's controller chooses which creature (if any) Gargos will fight, not the controller of the spell.
12-07-2019
wotc
If the target creature is an illegal target when Gargos's last ability tries to resolve, the ability doesn't resolve. If Gargos is no longer on the battlefield, the target creature won't deal or be dealt damage.
12-07-2019
wotc
If a spell targets one creature you control multiple times, Gargos's ability triggers once. If that spell targets multiple creatures you control, Gargos's ability triggers once for each of those creatures.
12-07-2019
wotc
To determine the total cost of a spell, start with the mana cost or alternative cost you're paying, add any cost increases, then apply any cost reductions (such as that of Gargos). The mana value of the spell remains unchanged, no matter what the total cost to cast it was.
12-07-2019
wotc
Gargos's triggered ability resolves before the spell that caused it to trigger. It resolves even if that spell is countered.
Random a card of Magic: The Gathering (MTG), but you can also roll the D20 dice, random a Planeswalker, have fun with the random rules and more.
less to cast.
Mathias Kollros2020-12-01
