Arremeter

Excess damage caused by a spell or ability is similar to how combat damage from a creature with trample is handled. Start with the amount of damage being dealt to the creature and determine what is “lethal.” This is the creature’s toughness minus the amount of damage that it already has marked on it, but ignoring any replacement or prevention effects that will modify this damage. Also ignore whether the creature has an ability such as indestructible that will result in it not being destroyed by this damage.

If either creature is an illegal target as Ram Through tries to resolve, the creature you control won’t deal damage to any creature or player.

If the target creature you control has deathtouch, 1 damage from it is lethal.

Once you’ve determined how much damage is excess, the creature you control simultaneously deals damage to the creature and to its controller. This damage may be modified by replacement or prevention effects.