Will Training Ground and other cards like it reduce the ninjutsu costs?
No. Ninjutsu is an activated abilty, but it is a card in your hand that has the ability, not a creature you control. Zirda, the Dawnwaker or other cards referring to activated abilities in general will reduce it.
Heartstone works in this sense as well especially If you use Mirage Mirror to copy it by reducing the Ninjutsu cost of all your creatures in hand with Satoru Umezawa to nothing but Dimir.
No, Heartstone also only reduces the cost of activated abilities of creatures, not creature cards in your hand.
Will Training Ground and other cards like it reduce the ninjutsu costs?
No. Ninjutsu is an activated abilty, but it is a card in your hand that has the ability, not a creature you control. Zirda, the Dawnwaker or other cards referring to activated abilities in general will reduce it.
Heartstone works in this sense as well especially If you use Mirage Mirror to copy it by reducing the Ninjutsu cost of all your creatures in hand with Satoru Umezawa to nothing but Dimir.
Nope.
"Creatures" only exist on the battlefield.
Everywhere else, it's a "creature card" (or creature spell on the stack).
No, Heartstone also only reduces the cost of activated abilities of creatures, not creature cards in your hand.
Nope.
"Creatures" only exist on the battlefield.
Everywhere else, it's a "creature card" (or creature spell on the stack).
-Irini Sengir