07/14/17 If the cost of an ability or an additional cost of a spell requires putting counters on an artifact, creature, enchantment, or land, that cost cant be paid
2022-02-18 If a creature in combat has first strike or double strike, you can activate the ninjutsu ability during the first-strike combat damage step
Its rather narrow as you need to build around it so completely that it rarely makes the 99, but a unique commander goes a long way towards making a great card
2 Solitude A Free Swords To Plowshares While discard spells are impressively powerful, no-strings-attached removal is arguably even better, and thats exactly what Solitude provides
While this would not be a problem if it instead serves the higher purpose of a game-ending combo, such as Sigardas Aid, I think Ephemerate does not quite do that
To facilitate these strategies or change a negative effect into positive, you need cards like Winding Constrictor and Strong, the Brutish Thespian respectively