Runeterra Deck: Leave no stone upon stone! Patch 2.6.0

TL;DR: try to gain board control with early units and Blade of the exile until you can drop Battering Ram, then Cataclysm/Golden Aegis/Tianna Crownguard until something explodes

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This is my take on the J4/Battering Ram deck. Your principal wincon is to grow your Ram as much as you can and make devastating blows in two or three turns with three or four attacks in total.

In early you have defensive options like the Fleetfeather Tracker/Brighsteel Protector package that allows you to eliminate early treats with impunity. Also Blade Squire and Runeweaver can reforge so you can create the Blade of the Exile quickly. You don't need to cast it necessarily in Riven: followers like the Laurent Protege or the Trifarian Gloryseeker will give it just as good use. But if the game goes slow enough you can put a lot of preassure with it. In fact you want your enemy to target the one with the blade because it leaves more comfortable plays to your TRUE win condition.

In the side of spells cards like Culling Strike and Sharpsight can eliminate more tricky units like the ones with elusive or quick attack. Just remember to not waste them if you can clean the board through combat alone. And if you have problems with swarm like aggro you can set the stage for Radiant Guardian. WARNING: this deck doesn't count with direct strikes like Singular Combat or Concerted Strike so don't get creative with her.

Talking about challengers don't mulligan Grand Plaza because it will allow you to: 1) make optimal trades with your 1-3 drops and 2) enable your Battering Ram to enter with the most efficient damage possible. So if you can take the damage its entirely recommendable to just play it, especially if you have a healty board.

Now, let's talk about your big boy: Battering Ram can easily drop the enemy nexus in a few strikes. Cards like the new Golden Aegis and Cataclysm turn an otherwise slow follower into an absolute monster with just two or three swings, shutting down the game with impunity thanks to his Nautilus tier health. Your challengers can open the path for more clear strikes to your Ram (btw you won't level up Jarvan very often so don't count with his created Cataclysm: if you have the shot you take it).

In the event that you are one swing away from victory Tianna Crownguard gives you that last push to break your opponent.