Printings
Siren Stormtamer
Card Information
Type: Creature — Siren Pirate Wizard
Mana Cost: 
CMC: 1
Part of the Reserved List: No
Color Identity:
Set: Commander Legends (CMR)
Rarity: Uncommon
Collector Number: 96
Oracle Text
Flying {U}, Sacrifice this creature: Counter target spell or ability that targets you or a creature you control.
Keywords
Format Legalities
Card Rulings
- November 10, 2020
Siren Stormtamer's activated ability can target a spell or ability that has multiple targets, as long as at least one of those targets is you or a creature you control.
Source: wotc - November 10, 2020
If the creature you control targeted by the target spell or ability leaves the battlefield, that spell or ability is no longer a legal target for Siren Stormtamer's ability. On the other hand, if that targeted creature becomes an illegal target for the target spell but remains on the battlefield under your control, the target spell or ability is still a legal target for Siren Stormtamer's ability.
Source: wotc
Price History
To study a single card is to glimpse the heart of a spell - a frozen moment of ambition, artistry, and arcane intent. Within each glyph lies a spark: a story untold, a duel turned, a destiny altered. Treat it not as mere parchment, dear seeker, but as a shard of the Multiverse itself.