Forum:Poison Draw Frog's Effect

I was looking tips for Poison Draw Frog and ended up finding this tip which is confusing me.

'''"It should be noted that if you tribute this card for a tribute summon or with "Spiritual Water Art - Aoi" or "Substitoad" "Poison Draw Frog"'s effect does not allow you to draw a card. Its effect is an optional "Trigger Effect" and misses the timing as it is not the very last thing that happened." '''

How is it that I can't draw a card whent it's tributed if it's being sent from the field to the graveyard when it's not being attacked face down?

This is the exact wording on the card effect.

"When this face-up card on the field is sent to the Graveyard (unless it was attacked while face-down and destroyed by battle), you can draw 1 card."

VolcanicNinja 06:02, 2 August 2009 (UTC)