Suddenly youve got this monstrous Creature on your side of the field, and all you had to do to create is was spend one mana and then gain some life
When paired with Lorcana cards that can heal him or any other character with the Support ability (adds their strength to a chosen card when they quest), Olaf can actually become a very powerful card very early on
It is the cards themselves that hold the key, there are types of design and certain mechanisms that go a long way to minimising both mana floods and mana screws
In fact, you could even dig out your toughest hitters early with Reanimate or similar cards
Dominaria and Lorwyn-Shadowmoor are two key planes featuring these creatures in the lore.
However, if youre the monarch, instead of milling two cards, those players have to mill ten instead