Its not a format I get to play often, but luckily my local game store, Gamestoria, has a two-headed giant event during every prerelease
Control - slow down the opponent while you spin up powerful cards
Where it gets interesting is when you use this blue creature as a vessel to proliferate other cards
"Am I going to lose to this card again?" Even in Standard, a format designed to showcase new cards with a constant rotation, we see cards that tend to cause an immeasurable amount of grief every time they're played
You can also go full on with such a plan and entirely abandon the synergies with Blood Artist etc
This, combined with a misunderstanding of card quality, leads to a number of reasonable players trying to cheat on their lands