Imagine sending Crobat ex in, placing damage on three opposing Pokmon in one turn, then sending in something like Shrouded Fable's Bloodmoon Ursaluna from your hand
Splitting Slime: this is a very easy card to turn monstrous
Evoltile Lagosucho X FIRE Level 3 [ Reptile / Effect ] ATK 1200 DEF 500 When this card is Normal Summoned: You can send 1 "Evolsaur" monster from your Deck to the Graveyard
Once per turn, when your opponent activates a Trap card or effect or a card or effect targeting an Armor monster: You can negate that effect and if you do destroy that card
They weren't always clear either, as players have reported they would often mistake the sweat mark that meant they were tired as a sign that the Digimon was thirsty
It's not actually that hard to deal with, but in scenarios where you can't remove it, you're going to have a very tough time winning the game