business cards holographic card mock-up design with effect Holographic Business Cards Mockup

If you have it in your hand, you can help guarantee the effect goes off by using ninjutsu on an unblockable creature

game rules

Much like Aladdin, Heroic Outlaw, Robin, Champion of Sherwood will net you a tasty two lore whenever he banishes an opposing character in a challenge - a shame his steel identity means he wont be forcing your opponent to lose lore as well like his predecessor

Urza's last ability doesn't change when you can play the exiled card

So you are relying on sticking a Mickey to the board to get some value out of him

The last such breakthroughs were the Trigger system and AbilityFactory system(huge boost there, in particular) and now we're looking at multi-state cards(Innistrad DFCs and Kamigawa Flips) and possibly scriptable replacement effects