Once per turn, if you control no monsters: You can target 1 "Ancient Gear" monster in your Graveyard; Special Summon it, and if you do, it gains 200 ATK (even if this card leaves the field).
You can only control 1 "Ancient Gear Reborn".
Inbound references
set from deck (2)
+1
+1
set from deck to spell trap zone (1)
+2-1
special summon from deck (1)
+1-2
add from deck to hand (7)
+2-1
+1
+1
+1
+1
+1-1
+1-1
excavate and send to gy (14)
+1
-1
-1
-2
send from deck to gy (2)
-1
special summon from gy (1)
+1
banish from deck (2)
+1-1
-1
banish from deck as cost (1)
banish from hand (1)
+2-1
banish from hand as cost (2)
+1-1
+1-2
place from hand face up on field spell trap zone (1)