This does not prevent them from attacking on their first turn, which can be taken advantage of by Baby Pokmon, which have no Energy cost to attack, or with Trainer cards that can attach Energy, such as Misty ( Genetic Apex )
Particularly in Mono-Red, card advantage is still shallow relative to other available card pools, but this is where Red can really shine
Oh also, Kiki-Jiki, Mirror Breaker + Restoration Angel obviously can attack and win, but sometimes, Post-Combat Main Phase, I just tutor Goblin Bombardment and sacrifice all the angels to win (instead of from attacking damage)
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Without Embereth's courage, the realm would falter and fall
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