mtg chance of drawing a card in opening hand The probability EDH you your 2 combo and at least 2 land in your starting with 6 mulligans is 1 in 100 MTG Hypergeometric Calculator — Draw

Umbra armor's effect is applied no matter why the enchanted creature would be destroyed: because it's been dealt lethal damage, or because it's being affected by an effect that says to "destroy" it (such as Nekrataal's triggered ability)

And if you get to double up with a Panharmonicon or Elesh Norn, Mother of Machines, thats just good clean living

Perhaps even better is when you do this trick on turn 4, which lets you surprise your opponent with a Chandra, Flamecaller a turn early

Such as

Whats more, Making History stands out as an even stronger ability that extends the Dumbo trick to other Evasives on the field, essentially granting you even more bang for your buck