Quote from 3drinks »Like Modern Infect, it's high-risk, high-reward. They either have the answer, or not.
I guess that I can understand what you're saying. Unfortunately, there's a huge difference between this cat deck and modern infect that impacts the usefulness of Might of Old Krosa. Namely, the clock. In an average infect deck, throwing a Might on a Blighted Agent or Glistener Elf means bringing your opponent several turns closer to death if your gambit pays off.
For cats, however, that math doesn't quite add up.
Let's say that we Drop Savannah Lions (or some comparable cat) on turn 1. If our opponent can't kill or block the cat, we win on turn 5 (15 life on turn 2, 10 life on turn 3, 5 life on turn 4, and 0 life on turn 5).
If we use Rancor or Bonesplitter, the persistent boost of +2 power allows us to win on turn 4 instead (13 Life on turn 2, 6 life on turn 3, and -1 life on turn 4).
If we get a single bonus from Might of Old Krosa, however, we are still on the same turn 5 clock (11 life on turn 2, 6 life on turn 3, 1 life on turn 4, and -4 life on turn 5). It doesn't kill the opponent even one turn faster without additional support.
While it is true that the boost gives our opponent less wiggle room and makes it easier for secondary attackers to matter, this deck gets far less utility out of Might than Infect does. For a buff to be worthwhile in this deck, I'd personally think that it needs to be cheap (cutting out the invocation) and must either protect the creature, help damage sneak through, or grant a bonus of at least +5 power.