Valkyrie's Call | Enchantment | | Whenever a nontoken, non-Angel creature you control dies, return that card to the battlefield under its owner's control with a +1/+1 counter on it. It has flying and is an Angel in addition to its other types. | Scott Murphy
Painful Quandary | Enchantment | | Whenever an opponent casts a spell, that player loses 5 life unless they discard a card. | David Palumbo
Doubling Season | Enchantment | | If an effect would create one or more tokens under your control, it creates twice that many of those tokens instead.
If an effect would put one or more counters on a permanent you control, it puts twice that many of those counters on that permanent instead. | Chuck Lukacs