Hello,
the card (Garstiges Geflügel ;6 Mana Hunter spell from Paradise expansion) says(translated):
Choose a Character; Summon 2 3/3 Birds, who are immune while(important part) they attack the chosen character.
What the card actually does is: Choose a Character, Summon 2 3/3 Birds that are immune when they attack. Then attack the chosen Target.
TLDR: The birds are immune when they attack, instead of being immune when they attack the chosen Target.
Correct Text: Wählt einen Feind. Ruft 2 Vögel (3/3) herbei, die Immun während des angriffs sind. Greift den gewählten Feind an.
Also all cards (except Gruul for some reason) that say changes/upgrades every(!) turn, only do that at the end of your turn.