This card can be played from drop, and you can play this if your vanguard has a Clan icon!
If you have a vanguard with Persona Ride and you did not ride this turn, remove this card, and activate persona ride. Until end of turn, you cannot ride and cannot activate persona ride.

CONT [Hand/Drop]: When you would pay the cost for Stride, if the cards to be discarded for that cost do not specify a specific card name and if your vanguard has a Clan icon, the cost can be paid with "Remove a "Primordial Heart Blaze" from your hand or drop, and turn up to one card from your damage zone face up.".