Wavebreak Hippocamp
Enchantment Creature — Horse Fish
Whenever you cast your first spell during each opponent's turn, draw a card.
Tritons search for omens in its wake.
イラスト：
Theros Beyond Death Promos#80sレア英語適正
裁定
An ability that triggers when you cast a spell resolves before the spell that caused it to trigger. It resolves even if that spell is countered.
This ability triggers only on your very first spell during an opponent’s turn, not the first spell after the card is on the battlefield. If you cast a spell before it’s on the battlefield (including if you cast this card somehow during an opponent’s turn), the ability won’t trigger.
If you have more than one opponent, this ability can trigger once during each of those opponents’ turns.
In a Two-Headed Giant game, this ability triggers no more than once during each opposing team’s turn.