Clash Royale card guide
Battle Healer is a sturdy melee troop who heals herself and nearby allies as she attacks. She also releases a heal when she's deployed.
Send Battle Healer next to Elixir Golem or another tank to keep the push alive for a long time. On defense she's a sturdy mini tank against small troops. Her healing is most valuable in pushes with several troops.
Cards that deal with it efficiently: