Dead Island 2

During the 4th quest of SOLA DLC, "Dance for me", you will have too pass a grid by powering it from a another button after your have explored the inside of the buliding (there also one weapon mod near the worbench insite "concussion".
The card "Ram" will be found in front of you on a barrel, near a big dead crusher in front of the swimming pool.

After the card is aquired, equipe it (its a abillity skill, place in a LB+RB slot (the 3rd slot to be exact)), then you will can use a meat grenade/bomb to attract 5 zombies or just attract them in a group of 5 without the bomb and then use LB + RB to apply the skill.

PS : It doesnt say to kill zombies with the abillity, just to use on 5 zombies with nice health.

Hope its good for y'all, let me know if can know how to add a picture of the card location but was not really hidden to me.

The Ram ability card is found on a table next to the pool overlooking the Main Stage. You'll visit this area during the Dance For Me DLC quest, after the Gruesome Twosome boss fight, but can return here whenever.

With the ability equipped, either train a group of at least 5 zombies, or use the meat bait curveball (if you have it), to force them to group up. Line up with them and use the ability by holding + and run through at least 5 of them. You don't have to kill them, just hit them with one use of the ability.

During the 4th quest of SOLA DLC, "Dance for me", you will have too pass a grid by powering it from a another button after your have explored the inside of the buliding (there also one weapon mod near the worbench insite "concussion".
The card "Ram" will be found in front of you on a barrel, near a big dead crusher in front of the swimming pool.

After the card is aquired, equipe it (its a abillity skill, place in a LB+RB slot (the 3rd slot to be exact)), then you will can use a meat grenade/bomb to attract 5 zombies or just attract them in a group of 5 without the bomb and then use LB + RB to apply the skill.

PS : It doesnt say to kill zombies with the abillity, just to use on 5 zombies with nice health.

Hope its good for y'all, let me know if can know how to add a picture of the card location but was not really hidden to me.

When you reach the main stage of the SoLA DLC, you will encounter multiple zombies and 4 of the orbs. You will need to go into the room at the back left of the stage, there will be a card there for collection, and this will bring the new ram skill.

Enable the ram skill, then wait for a few of the zombies to come up onto the stage. I set the music starting first, so I had multiple zombies coming at me at the sametime.

Hit LB+RB and run at the zombies, you should get 5 in a row very easily, and this will unlock the achievement.

When you reach the main stage of the SoLA DLC, you will encounter multiple zombies and 4 of the orbs. You will need to go into the room at the back left of the stage, there will be a card there for collection, and this will bring the new ram skill.

Enable the ram skill, then wait for a few of the zombies to come up onto the stage. I set the music starting first, so I had multiple zombies coming at me at the sametime.

Hit LB+RB and run at the zombies, you should get 5 in a row very easily, and this will unlock the achievement.