Whenever this creature attacks, you may pay . If you do, put a +1/+1 counter on it.
Some passengers ride without tickets.
Legal in
Pioneer, Modern, Legacy, Vintage, Commander, Pauper
Rulings (9)
Energy counters aren't mana. They don't go away as steps, phases, and turns end, and effects that add mana "of any type" can't give you energy counters.
2024-06-07
Energy counters are a kind of counter that a player may have. They're not associated with any specific permanents.
2024-06-07
If a spell or ability with one or more targets states that you "may pay" some amount of , and each permanent that it targets has become an illegal target, the spell or ability won't resolve. You can't pay any even if you want to.
2024-06-07
Some spells and abilities that give you may require targets. If each target chosen is an illegal target as that spell or ability tries to resolve, it won't resolve. You won't get any .
2024-06-07