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Description
yugipedia.com/wiki/Sonic_Track…

This card is used to Ritual Summon "Transonic Bird". Ritual Summon 1 "Transonic Bird" from your hand, by Tributing monsters from your hand and/or field whose total Levels equal 4 or more, but the Summoned monster’s Level becomes equal to the total Levels of the monsters used. You can banish this card from your GY, then target 1 Ritual Monster you control; send 1 Ritual Monster with the same Type and/or Attribute as that face-up monster from your Deck to the GY. You can only use this effect of "Sonic Tracker" once per turn.

Description
yugipedia.com/wiki/Sonic_Track…

This card is used to Ritual Summon "Transonic Bird". Ritual Summon 1 "Transonic Bird" from your hand, by Tributing monsters from your hand and/or field whose total Levels equal 4 or more, but the Summoned monster’s Level becomes equal to the total Levels of the monsters used. You can banish this card from your GY, then target 1 Ritual Monster you control; send 1 Ritual Monster with the same Type and/or Attribute as that face-up monster from your Deck to the GY. You can only use this effect of "Sonic Tracker" once per turn.