If the turn player summons a Link monster with one or more active markers, THEN you can special summon other extra deck monsters to the zones indicated by the active markers (as well as main deck monsters)
"While were unable to share specifics, wed like to touch on something weve paid special attention to," they said
Alternatively, you can bounce a low-cost Dragon or one with a powerful enters ability you want to reuse
Special Summon a number of your Beast, Beast-Warrior, and/or Winged Beast monsters, that are banished and/or in your GY, but negate their effects, then, immediately after this effect resolves, Link Summon 1 "Tri-Brigade" Link Monster using only those monsters
Originally, Exchange of the Spirit did not require that the opponent have any particular number of cards in their graveyard