Tectonic Giant will exile two cards and I'll get to pick one of them to be available to play until end of turn
As there's only one card just like it being printed, Amazon suggests your chances of finding it in a single booster pack are 0.00003%
That experience explains why so many players now search for the best Partner Commanders in MTG instead of sticking to single-command options
The extra draw step can also win the game with a Laboratory ManiacLaboratory Maniac effect if your library is empty, perhaps due to LevelerLeveler or another effect
While Id like to think Ive never been the worst offender in this regard, Ive definitely had my slip-ups in the past, too
These generally deal with copying himself (Spawnwrithe), abilities that scale off size (Cephalid Constable, and protecting himself from removal (Thrun, the Last Troll)