When this creature enters the battlefield, exile target creature card with mana value 2 or less from your graveyard
That's a pretty swift ascension of 360%
Mana ramp is a vital component of successful Commander Deck construction, enabling you to accelerate your mana production and cast powerful spells ahead of schedule
Six I love a good self-mill card, and Six is one of the best since its both a payoff for milling, a source of mill, and just a good card that draws lands when it attacks
For example, if you control a Buzzard-Wasp Colony when Hei Bai dies, you'll put the appropriate number of each kind of counter onto both the Buzzard-Wasp Colony and the target creature
It turns out that Delver decks (or more broadly, Blue tempo decks) and have opposite matchup profiles, and you can change roles to play as whatever deck your opponent doesn't want to face