Summoning Trap [Zendikar] Skeleton Warrior not its controller

not its controller

I fear the knowledge that comes from a place like this

If you cast it any time a sorcery couldn't have been cast

{R/P}: Moltensteel Dragon gets +1/+0 until end of turn

Summoning Trap [Zendikar] Skeleton Warrior not its controllerSet: Zendikar Type: Instant Trap Rarity: Rare Cost: {4}{G}{G} If a creature spell you cast this turn was countered by a spell or ability an opponent controlled, you may pay {0} rather than pay this spell's mana cost. Look at the top seven cards of your library. You may put a creature card from among them onto the battlefield. Put the rest on the bottom of your library in any order.