Dauntless Dismantler Two mana for a 1/4 Human that has multiple powerful abilities in the Uncommon slot
Rals -2 and ultimate arent as good as Ajani Vengeants either, but at all points on the curve the card does most of what you want it to
Even when it isnt guaranteed to counter every spell, just countering some spells for 1U is very good
In fact, creatures that were clearly human in the art got the human subtype added
(Tetravus even had a means by which the counters could be reclaimed.) From a design innovation standpoint, this one's a big one and is a tool that certain designers (myself in particular) will use again and again
The entire set is all about wizards, druids, warlocks, and mages honing their craft but even more importantly about the various kinds of spells they cast