If you haven't actually drawn any cards that turn, the rest of the ability has no effect
Poison - Toxic plants and animals (by necessity) have a natural resistance to their own species' poison/venom (some can resist those from other species as well) to avoid getting hurt by their own toxins
If a player with a high-roller deck can't trust that his or her opponent will treat their cards with care, they'd sooner just concede
Thunderbreak Regent Thundermane Dragon Thundermaw Hellkite Tiamat Tiamat's Fanatics Twinflame Tyrant Two-Headed Dragon Two-Headed Hellkite Tyrant of Kher Ridges Tyrant of Valakut Tyrant's Familiar Ureni of the Unwritten Ureni, the Song Unending Utvara Hellkite Vaevictis Asmadi Vaevictis Asmadi, the Dire Vampiric Dragon Velomachus Lorehold Velukan Dragon Vengeful Ancestor Verix Bladewing Viashivan Dragon Volcanic Dragon Voracious Dragon Vrondiss, Rage of Ancients Warmonger Hellkite Wasitora, Nekoru Queen Worldgorger Dragon Wrathful Red Dragon Young Red Dragon Ziatora, the Incinerator Zodiac Dragon Zurgo and Ojutai
If you want to save some money, keep an eye on what is performing well at the tournament, because there's a good chance that the key cards in the breakout deck will see a meaningful price increase
Kalonian Hydra: Kill it or else
