This creature can't attack unless defending player controls a Mountain
This ability affects every card in every game zone, all tokens on the battlefield, and all spell copies on the stack, regardless of who controls or owns them
Activate only if you control an attacking modified creature
And, as is a running theme amongst white creatures, the Grand Abolisher is big enough to be pulled back with a Reveillark or Sun Titan to continually cause problems
He still ranks near the bottom of Mythic-rarity cards from Through the Ages, but Mythics and Mythics, and since most Play Boosters dont contain any cards from the Through the Ages bonus sheet, Clive is scarce enough to justify a double-digit price
Granted, it's a bit harder to swing a Vehicle deck with Breya, because your decisions are more deliberate if you end up selling your ace Vehicle for a bit of commander damage, you're just asking to lose a carefully stacked advantage