Spells as traps?

[Shadowbane13]

Hey I saw somewhere, i completely forget where, but I saw that there is a feat the you can channel spells into the ground to leave as "traps" essentially. Idk if this is a 3.5e feat or not but I have no restrictions on books or anything. Let alone not sure if it's a feat worth taking. If anyone has any idea about the feat (name or location) please let me know. Thanks guys.

P.S. Was thinking of using it for CC with my duskblade seeing that I have an absurd amount of spells. Still unsure though.

[sleepyphoenixx]

Earthbound Spell from PHB2, probably. It has a +2 level adjustment though and the traps disappear after 1 hour, so it's not all that good.

[nedz]

Earthbound Spell from PHB2, probably. It has a +2 level adjustment though and the traps disappear after 1 hour, so it's not all that good.

PH2 p91

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[MaxiDuRaritry]

Earthbound Spell from PHB2, probably. It has a +2 level adjustment though and the traps disappear after 1 hour, so it's not all that good.If the spell qualifies for Persisting, you could always use Persistent Spell, which should boost the trap function to 24 hours.