If this card is sent to the Graveyard: You can activate 1 of these effects.● Target 1 face-up monster your opponent controls; change that target to face-down Defense Position.● Target 1 face-up Spell/Trap Card your opponent controls; return that target to the hand. This turn, your opponent cannot activate cards with the same name as the card returned to the hand by this effect.
Magical Merchant can be an easy card to send Tackle Crusader to the graveyard to activate its effects right away. You can pair this with other cards that can activate right away like Needle Sunfish, or Skull-Mark Ladybug.
Tackle Crusader's first effect can flip your opponent's monster to face-down, which you can then use Dark World Lightning to destroy. This is good if you can get Tackle Crusader's effect first before using Dark World Lightning, or if your opponent has a set card and a face-up monster on the field.
Generally, cards that provides good effects but require a discard can already work well with effects that will activate when it gets to the graveyard. Dealings can be good way to get your opponent to discard, giving you information about their deck. Rising Energy can be good if your opponent has multiple monsters attacking you so that you can flip the other one to face-down, or return your opponent's attack increasing field spell. It works better if you are also using a monster that can inflict piercing damage for the monster that is flipped.
Activates from your Graveyard / Changes Battle Positions / Flips monsters face-down / Returns from field to hand
Prevents activation of your opponent's Spell Cards / Prevents activation of your opponent's Trap Cards
sometimes KC cup cards add crazy cards and only a few notice it. While rare cards are appealing for the game, they shouldn't be that restrictive. Monarch awaken, dark magic attack, fossil tusker and some other cards from flipping campaigns should be available by now... many months have passed.