If you put a Trickster's Elk on an opposing creature to shrink it down to a 3/3, and then the creature dies later on, you are the one left with the original 3/3 Elk on the battlefield, not your opponent
They are not spells - you don't need to pay mana to put them into play, and they cannot be 'countered' by counter spells
You can even sacrifice it to gain three life, which makes it good in a pinch
Enhance your collection or kindle epic battles
If the spell or ability has damage divided as it was cast or activated, the division can't be changed (although the targets receiving that damage still can)
Meddle-like effects in limited have always been relatively strong, but Willbender takes this to a new level by allowing you to redirect spells AND effects