Shields

Item	Block	Earliest biome	Weight
Banded Shield	42	Swamp	5
Black Metal Shield	78	Plains	5
Black Metal Tower Shield	104	Plains	5
Bone Tower Shield	32	Swamp	4
Bronze Buckler	16	Black Forest	3
Carapace Buckler	78	Mistlands	5
Carapace Shield	96	Mistlands	5
Flametal Shield	114	Ashlands	5
Flametal Tower Shield	140	Ashlands	5
Iron Buckler	28	Swamp	4
Iron Tower Shield	52	Swamp	4
Nord Buckler	88	Deep North	4
Nord Greatshield	158	Deep North	5
Nord Shield	132	Deep North	5
Serpent Scale Shield	60	Swamp	5
Shield of Roots	48	Swamp	4
Silver Shield	60	Mountain	5
Wood Shield	6	Meadows	4
Wood Tower Shield	10	Meadows	4

Earliest biome: the first biome where you can get every material this item needs.