diff --git a/code/modules/mob/living/carbon/alien/humanoid/caste/drone.dm b/code/modules/mob/living/carbon/alien/humanoid/caste/drone.dm
index 7487ffa6313..a1e599c5b70 100644
--- a/code/modules/mob/living/carbon/alien/humanoid/caste/drone.dm
+++ b/code/modules/mob/living/carbon/alien/humanoid/caste/drone.dm
@@ -36,7 +36,7 @@
 			src << "\green You begin to evolve!"
 			for(var/mob/O in viewers(src, null))
 				O.show_message(text("\green <B>[src] begins to twist and contort!</B>"), 1)
-			var/mob/living/carbon/alien/humanoid/queen/new_xeno = new (loc)
+			var/mob/living/carbon/alien/humanoid/queen/large/new_xeno = new (loc)
 			mind.transfer_to(new_xeno)
 			del(src)
 		else
diff --git a/code/modules/mob/living/carbon/alien/humanoid/caste/sentinel.dm b/code/modules/mob/living/carbon/alien/humanoid/caste/sentinel.dm
index 226824c6ab4..b312052728e 100644
--- a/code/modules/mob/living/carbon/alien/humanoid/caste/sentinel.dm
+++ b/code/modules/mob/living/carbon/alien/humanoid/caste/sentinel.dm
@@ -42,3 +42,40 @@
 						healths.icon_state = "health5"
 			else
 				healths.icon_state = "health6"
+
+
+/mob/living/carbon/alien/humanoid/sentinel/verb/evolve() // -- TLE
+	set name = "Evolve (250)"
+	set desc = "Become a Praetorian, Royal Guard to the Queen."
+	set category = "Alien"
+
+	if(powerc(250))
+		adjustToxLoss(-250)
+		src << "\green You begin to evolve!"
+		for(var/mob/O in viewers(src, null))
+			O.show_message(text("\green <B>[src] begins to twist and contort!</B>"), 1)
+		var/mob/living/carbon/alien/humanoid/sentinel/large/new_xeno = new (loc)
+		mind.transfer_to(new_xeno)
+		del(src)
+	return
+
+/mob/living/carbon/alien/humanoid/sentinel/large
+	icon = 'icons/mob/alienlarge.dmi'
+	icon_state = "prat_s"
+	pixel_x = -16
+	maxHealth = 200
+	health = 200
+
+/mob/living/carbon/alien/humanoid/sentinel/large/update_icons()
+	lying_prev = lying	//so we don't update overlays for lying/standing unless our stance changes again
+	update_hud()		//TODO: remove the need for this to be here
+	overlays.Cut()
+	if(lying)
+		if(resting)					icon_state = "prat_sleep"
+		else						icon_state = "prat_l"
+		for(var/image/I in overlays_lying)
+			overlays += I
+	else
+		icon_state = "prat_s"
+		for(var/image/I in overlays_standing)
+			overlays += I
\ No newline at end of file
diff --git a/code/modules/mob/living/carbon/alien/humanoid/queen.dm b/code/modules/mob/living/carbon/alien/humanoid/queen.dm
index 15c4e32ee2a..8cd2c767e42 100644
--- a/code/modules/mob/living/carbon/alien/humanoid/queen.dm
+++ b/code/modules/mob/living/carbon/alien/humanoid/queen.dm
@@ -73,7 +73,7 @@
 
 
 /mob/living/carbon/alien/humanoid/queen/large
-	icon = 'icons/mob/alienqueen.dmi'
+	icon = 'icons/mob/alienlarge.dmi'
 	icon_state = "queen_s"
 	pixel_x = -16
 
diff --git a/code/modules/mob/living/simple_animal/hostile/alien.dm b/code/modules/mob/living/simple_animal/hostile/alien.dm
index 0d96e85d12f..fba59db37c8 100644
--- a/code/modules/mob/living/simple_animal/hostile/alien.dm
+++ b/code/modules/mob/living/simple_animal/hostile/alien.dm
@@ -75,7 +75,7 @@
 
 /mob/living/simple_animal/hostile/alien/queen/large
 	name = "alien empress"
-	icon = 'icons/mob/alienqueen.dmi'
+	icon = 'icons/mob/alienlarge.dmi'
 	icon_state = "queen_s"
 	icon_living = "queen_s"
 	icon_dead = "queen_dead"
diff --git a/icons/mob/alienlarge.dmi b/icons/mob/alienlarge.dmi
new file mode 100644
index 00000000000..340eba5337f
Binary files /dev/null and b/icons/mob/alienlarge.dmi differ
diff --git a/icons/mob/alienqueen.dmi b/icons/mob/alienqueen.dmi
deleted file mode 100644
index 15621520237..00000000000
Binary files a/icons/mob/alienqueen.dmi and /dev/null differ