Feeling Spiritual aren't we? :)

|Hermes |0|xxxx|Spellcaster/Spirit/Effect|Fire|4||1100|200|This card cannot be Special Summoned. This card returns to the owner's hand during the End Phase of the turn it is Normal Summoned or flipped face-up. When this card is Normal Summoned or flipped face-up, you can Normal Summon 1 additional time this turn. When a monster Normal Summoned is by this card’s effect, both players take damage equal to that monster’s DEF.|

|Trismegistus|0|xxxx|Spellcaster/Fusion/Spirit/Effect|Fire|8||2600|1300|”Hermes” + “Medea” This card can only be Special Summoned from your Extra Deck by sending the above cards you control to the Graveyard.This card returns to its owner's Extra Deck during the End Phase of the turn it is Special Summoned. When this card is Special Summoned, banish 1 level 4 or lower Spirit Monster from your Graveyard, all monsters your opponent control loses ATK equal to the DEF of the banished monster. This card can attack all of your opponent’s monsters once. This monster cannot attack your opponent directly if it attacks any monster first. When this card returns to your Extra Deck, gain life points equal to twice the DEF of the banished monster.|

|Medea|0|xxxx|Zombie/Spirit|Light|4||1500|800|This card cannot be Special Summoned. This card returns to the owner's hand during the End Phase of the turn it is Normal Summoned or flipped face-up. Once per turn you can tribute this card to Special Summon 1 monster with 1500 DEF or less in your Graveyard and its effects are negated, if you cannot, add that monster to your hand instead.|

|Thanatos|0|xxxx|Fiend/Spirit/Effect|Dark|6||2600|1800|This card cannot be Special Summoned. This card returns to the owner's hand during the End Phase of the turn it is Normal Summoned or flipped face-up. When this card is Tribute Summoned, destroy 1 other Spirit monster you control. If you cannot, return this card to your hand. When this card destroys a monster in battle, this card can attack once again in the same Battle Phase. When this card returns to your hand during the End Phase, your opponent randomly discards 1 card from their hand.|

|Isis|0|xxxx|Fairy/Spirit/Effect|Wind|5||1800|2200|This card cannot be Special Summoned. This card returns to the owner's hand during the End Phase of the turn it is Normal Summoned or flipped face-up. If your opponent controls a monster and you control no monsters, you can Normal Summon or Set this card without Tributing. When this card is Normal Summoned or flipped face-up, select 1 monster in your Graveyard that was destroyed during the last turn’s Battle Phase. Special Summon it. If you cannot, gain Life Points equal to its Level x 300.|

|Orpheus|0|xxxx|Fiend /Spirit/Effect|Light|1||?|?|This card cannot be Special Summoned. This card returns to the owner's hand during the End Phase of the turn it is Normal Summoned or flipped face-up. When this card is Normal Summoned or flipped face-up, you can send 1 Spirit monster from your deck to the Graveyard. If you do, pay Life Points equal to its level x 200. Until the End Phase, this card's name is treated as that monster's name, and it gains that monster's ATK and DEF.|

|Io|0|xxxx|Fairy /Spirit/Effect|Wind|3||800|1400|This card cannot be Special Summoned. This card returns to the owner's hand during the End Phase of the turn it is Normal Summoned or flipped face-up. Once per turn, you can gain 700 Life Points for each Spirit monster you control. When this card returns to your hand, draw 1 card.|

|Polydueces|0|xxxx|Thunder/Spirit/Effect|Earth|4||1500|800| This card cannot be Special Summoned. This card returns to the owner's hand during the End Phase of the turn it is Normal Summoned or flipped face-up. If this card attacks a Defense Position monster, inflict piercing Battle Damage to your opponent. When this card returns to your hand, inflicts 800 damage to your opponent.|

|Penthesilea|0|xxxx|Warrior/Spirit/Effect|Water|4||1600|1200| This card cannot be Special Summoned. This card returns to the owner's hand during the End Phase of the turn it is Normal Summoned or flipped face-up. When this card returns to your hand, select 1 face-up monster or face-down Spell/Trap card your opponent control, that card cannot attack and/or activate until the End Phase of your opponent’s turn.|

|Atemisia|0|xxxx|Warrior/Spirit/Effect|Water|6||2200|1600| This card cannot be Special Summoned. This card returns to the owner's hand during the End Phase of the turn it is Normal Summoned or flipped face-up. When this card destroys a monster, you can select up to 2 cards in your opponent’s hand, reveal those cards. Those cards cannot be Activate, Summoned or Set until the End Phase of your opponent’s turn.|

|Cry of the Soul's Will|0|xxxx|Spell Card|Spell||Equip|||Equip only to a Spirit monster. It gains 100 ATK times its level. When the Equipped monster return to your hand, return this card to your hand. If the equipped monster is destroyed, return that monster to your hand at the End Phase.|

I think i have yet to review the last 3.

Orpheus is an alright searcher-esque monster. You might run out of spirits fast though, since spirit decks usually need other monsters and heavy S/T support to flourish.

Lo is amazing and very spirit-deck compatible.

Cry of the Souls will is also pretty good, worth a try.

|Messiah|0|xxxx|Fairy/Fusion/Spirit/Effect|Divine|7||2600|1800| “Orpheus” + “Thanatos” This card can only be Special Summoned from your Extra Deck by sending the above cards you control to the Graveyard. This card returns to its owner's Extra Deck during the End Phase of the turn it is Special Summoned. While this card is face-up on the field, Spirit monsters can be Special Summoned from hands, Decks and Graveyards. You can banish 1 non-Spirit monster from your Graveyard to Special Summon 1 Spirit monster from your Graveyard.|

|Roaring Barrier of Returned Souls|0|xxxx|Trap Card|Trap||||| Activate only when an opponent's monster declares an attack and you control no monster. For each Spirit monster returned to your hand during the last turn’s End phase, you can negate attacks up to that amount. This card remain face-up until the end of the Battle Phase and pay 800 to Set this card face-down again instead of sending it to the Graveyard.|