how many special illustration rares per booster box I just pulled 12 SIRs in one booster box : r/PokemonTCG
Description
And these are the best ones for Commander.

This blister contains one factory sealed HS Undaunted booster pack in its original retail packaging

Dual Autograph Card Signed by David Tennant (The Doctor) and Billie Piper (Rose Tyler)

"Thunder Dragon" + 1 Thunder monster Must be either Fusion Summoned, or Special Summoned during the turn a Thunder monster's effect was activated in the hand, by Tributing 1 Thunder Effect non-Fusion Monster (in which case you do not use "Polymerization")
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Ships within 48 hours · Estimated delivery Jul 29 - Aug 3