Keep backup plans ready, such as additional Pokmon that can quickly reapply Sleep or Trainers that disrupt the opponent
Example: An ability reads, All artifacts are 1/1 artifact creatures. If a permanent is both an artifact and an enchantment, it will become an artifact enchantment creature. Rule 205.1b., for instance, explains that if you animate an artifact using Tezzeret, Agent of Bolass second ability, it will retain all of its prior sypertypes, types and subtypes
This sounds wonderful, no
It was the Elves job to protect that very balance, even at the cost of ending the imbalance with death
MTG these days has too many ETB creatures and synergies with enter/leaving the battlefield
Indominus Rex, Alpha likes it both on the battlefield to sacrifice creatures before you bring out your massive dinosaur and in-hand to discard as part of its enters trigger