Thinking about EDH specifically, you can maximize that -1 ability to either go heavy on tap and untap synergies, or to have your creatures untapped and ready to defend your captain
An absolute killer of aggressive decks, a single Bonecrusher Giant played on curve on turn two and three was often enough to stymie most aggressive starts, once again making something that goes huge over the top like Embercleave or Winota a necessity to make up for the lost ground
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In this case, it can only be Special Summoned in the Extra Zone or in front of the Link Monster
UR Ultra Rare Metalfoes Counter X TRAP If a card(s) you control is destroyed by battle or card effect: Special Summon 1 "Metalfoes" monster from your Deck
While Guzzlord isnt able to inflict Poison by default, attaching a Poison Barb to it while active will do the trick