I still don't get who the hell at Shueisha/NAS/Konami thought it was a good idea to restrict this card's effect to Dark Magician only when this card is printed in real life, even though Atem clearly used it to summon Dark Magician Girl.
Your LP total always rounds up in YGO. (Which makes sense from a math standpoint anyway, the nearest whole number to 0.5 is 1 anyway).
The amount of LP you are considered to have paid is ALSO rounded up to 1, incidentally. (Which is relevant for cards like Life Absorbing Machine, and likely the Skill thresholds in Duel Links, should you have lost exactly 1799 LP or something prior.)
Yeah, I’ve had many problems where this card won’t activate and have lost many games due to this issue. Right when my turn would begin I would try to use this card and the game wouldn’t let me. I’ve email konami many times about this and they only response I’ve got was an automated email saying it’ll take them a couple weeks to email me back. That shows me that they don’t really care.
When your life point is 2000 or lower, this card would be such a big advantage. Savage!