The first Tasigur allows you to double spell on a critical turn and pressure them from both regular and poison angles while serving as a threatening source of card advantage
For example, the Terapagos ex card above has the Crown Opal attack, which costs 1 Grass, 1 Water and 1 Lightning Energy to use, but it deals 180 HP of damage and also stops all attack damage done to the Terapagos ex on your opponents next turn, if dealt by a Basic, non Colorless Pokmon
Plus, theres all the fun of Tree of Perdition and its life-swapping chicanery that can shorten a match, or be used as a bargaining chip for politically-minded games
Zombies put free sacrifice outlets to great use, and Carrion Feeder is all the more desirable because it shares the relevant creature type
Summary Use Podding strategies like Birthing Pod to upgrade creatures in Legacy and Commander for powerful plays
Is this card a good choice for beginners