No. A Ready Action Will Not Trigger on an Enemy that is Concealed from You. tl;dr You need to be able to perceive (not limited to sight) the event or creature that will trigger the ready action.
Can you ready an attack?
No. On your turn, you can move a distance up to your speed and take one action. you can attack twice, instead of once, whenever you take the Attack action on your turn. To do so, you can take the Ready action on your turn, which lets you act using your reaction before the start of your next turn.
Do ranged attacks provoke attacks of opportunity 5E?
Ranged attacks do not provoke; from the Basic Rules, p73: Aiming a ranged attack is more difficult when a foe is next to you.
What happens when you make a ranged attack with a weapon?
Aiming a ranged attack is more difficult when a foe is next to you. When you make a ranged attack with a weapon, a spell, or some other means, you have disadvantage on the attack roll if you are within 5 feet of a hostile creature who can see you and who isn’t incapacitated.
Can a ranged attacker move away from an adjacent creature?
However, a ranged attacker can move away from a creature with reach as long as it stays within that reach; and if that ranged attacker is then non-adjacent, it doesn’t sound like it has disadvantage. This sounds a little weird to me, hence the question: Are ranged attacks within melee reach of an opponent disadvantaged if non-adjacent?
Are there disadvantages to ranged attack within melee reach?
Are ranged attack within melee reach disadvantaged if non-adjacent? In D&D 5e, moving within reach of an opponent does not provoke any attacks of opportunity unless you leave the opponents reach. Ranged attacks have disadvantage if you’re next to an opponent.
Is it a disadvantage to have ranged reach?
Quixotically, this might suggests that it’s actually a downside to have reach when it comes to defending against ranged attackers. After all, a ranged attacker next to an opponent with normal reach can’t avoid the disadvantage by just stepping away without provoking an attack of opportunity.
