to clarify, cards that say "creature" only refer to permanents/cards on the battlefield. If it said "creature cards," then it would be referring to any card in any zone with the type "creature." Because cards with the ninjitsu ability are in your hand, they are not permanents, and are therefore not affected by cards that simply say "creatures"
sarpnasty says... #1
No, while the ninjas are in your hand, the are "creature cards" not "creatures". Training Grounds only affects creatures.
January 4, 2012 9:19 p.m.