MP23-EN055 * Groza, Tyrant of Thunder * Ultra Rare * 25th Anniversary Tin: Dueling Heroes Mega Pack SUDA-EN027 ) You can discard 1

) You can discard 1 "Gem-Knight" or "Melodious" card

You can only use this effect of ""Vanguard of the Underground Emperor"" once per turn

If you have no "Let's Go Together" in your face-up field

(This card is always treated as a ""Rescue-ACE"" card

add 2 "Arcana Force" monsters with different names from your Deck to your hand

MP23-EN055 * Groza, Tyrant of Thunder * Ultra Rare * 25th Anniversary Tin: Dueling Heroes Mega Pack SUDA-EN027 ) You can discard 11 Tuner + 1+ non Tuner Fiend monsters During your opponent's Main Phase (Quick Effect): You can target 1 Effect Monster on the field; discard 1 monster, and if you do, negate that monster's effect until the end of this turn. You can only use this effect of "Groza, Tyrant of Thunder" once per turn. If a Fiend monster(s) is sent from the hand to your GY (except during the Damage Step): You can apply 1 of the following effects to this card, until the end