The Overly Cautious Shopkeep

Whenever The Overly Cautious Shopkeep blocks or
is blocked, roll a d20. Put level counters on this creature equal to the number rolled.
Level 1+: Ward {1}, First Strike 5/5
Level 26+: Ward {2}, Reach 8/8
Level 49+: Flying, Vigilance 11/11
Level 73+: Hexproof, Lifelink 15/15
Level 107+: Trample 19/19
Level 159+: Shroud, Indestructible, Can't be Blocked 21/21
"But what if..."