Your opponents are incentivized to kill omer, but doing so during combat procs its ability, so it will likely go unblocked
In a multiplayer format, this is an incredibly potent form of evasion, forcing opponents to double block your threats or let damage through
YouTuber Tricky Gym explains that Gyarados EX's moves take advantage of this, as Gyarados EX has the Water moves Waterfall - which deals 100 damage for just three Water energies - and Tyrannical Tail
Why it's relevant : Play: In Singer shells, it's easy to cast and hard for opponents to ignore
Poke Card Creator Contest Pikachu #5 CGC 10 GEM MINT Previous slide Next slide SOLD 2004 Pokemon Kids' WB
The 5 life points are the problem, and for a long time this card went criminally underused because players had a hard time giving their opponents life points