If were using Solemnity as a sideboard option, it needs to be in a deck that can play removal on turn 2 and follow this on turn 3 with a threat or more removal
Both sides of the MDFC work well together
Shadowless Charizard Base Set Holographic (1st Edition) - One of the first Pokmon cards ever printed, featuring one of Pokmons most recognizable names
Made to guard against wear, bent corners, dust, and fingerprints during play, storage, or display, Prismatic Defender Holographic Card Sleeves combine protection with personality
What else was out there
send 1 Machine monster from your Deck to the GY, whose ATK equals its own DEF, with a lower Level than that targeted monster, and if you do, the targeted monster gains ATK/DEF equal to the Level of the monster sent to the GY x 100