Emrakul is fantastic against Control-heavy strategies as her ability is a cast ability, so even if your opponent counters the spell, you are still able to control their next turn
The value of Dismember is the flexibility of casting it with 2 Phyrexian mana
Arguably, cards like Hard Evidence, Thraben Inspector, and Novice Inspector fulfill a similar role, but they require more mana investment in the long run
Creature - Human Cleric Quintessential Katana Equipped creature gets +1/+1 and has "Whenever this creature deals combat damage, untap it and you gain 2 life." Whenever a Ninja you control enters, you may attach this Equipment to it
After damage calculation, if this card battled an opponent's monster: Destroy that monster