Some of these cards can change which side is in use once they've already been played, via the Transform mechanic
When you play against a deck with a high density of removal spells, waiting to cast Pack Rat until turn 5 is just insane because it forces them to have two removal spells immediately
With synergies for +1/+1 counters everywhere, your board will grow out of control
In this example, I use [c]Augur of Skulls[/c], a 1/1 with regenerate to block [c]Raging Redcap[/c], a 1/2 with double strike
Wing It This is probably my favorite card name in the whole set
Obelisk Spider Aside from spiders, Obelisk Spider has another natural home with Hapatra, Vizier of Poisons