Here, I will be discussing an early example of outside-the-box thinking that was fairly successful
However, if a Lion Umbra you control is attached to a creature you don't control and that creature has no Auras controlled by that creature's controller attached to it, no Equipment attached to it, and no counters on it, Lion Umbra will be put into its owner's graveyard due to being attached to an illegal object the next time state-based actions are performed
If you're wondering why that shadow is so important with holographic cards, it's because that shadow is half of the effect
Is Toxic Card legal to play
This strategy requires you to be very strict when examining a card's condition before you buy it, a process known as pre-grading
You can simply ping it to the top of your library whenever you want to draw into it next turn