Fun Retrains

Grand Sealmaster Meisei
Spellcaster/DARK/Link 1/ATK 1100 Arrow: D
***1 Normal Summoned/Set Spellcaster monster or 1 Normal Spellcaster monster
This card's name becomes "Sealmaster Meisei" while it is on the field or in the GY. If this card is Link Summoned: You can activate 1 "Talisman of Trap Sealing" or "Talisman of Spell Sealing" directly from your hand or Deck. While you control a face-up Spell/Trap, that specifically lists the card "Sealmaster Meisei" in its text, monsters in either player's possession cannot activate their effects, also negate the effects of all other face-up monsters on the field.

Metallizing Parasite - Stellatite
Aqua/WATER/Link 1/ATK 1000 Arrow: U
1 Union monster
Once per turn, you can either: Target 1 monster on the field; equip this card to that target, OR: Unequip this card and Special Summon it in Attack Position. A monster equipped with this card is unaffected by your opponent's card effects (except its own), also if the equipped monster would be destroyed by battle or card effect, destroy this card instead. If this card is sent from the field to the GY: You can target 1 monster you control; equip 1 appropriate Union monster from your Deck to that monster, but the Union monster you equipped cannot be Special Summoned this turn.

Goblin Union Force
Warrior/EARTH/Link 1/ATK 3000 Arrow: D
**1 "Goblin" monster in Defense Position
If this card attacks, its original ATK becomes 0 at the end of the Battle Phase. During your opponent's End Phase: This card's original ATK becomes 3000. If this card is destroyed by battle or card effect: You can Special Summon 1 "Goblin" monster from your Deck.

Or maybe Warrior monster

Darkest Blade
Warrior/DARK/Link 1/ATK 1000 Arrow: D
1 Level 4 or lower Warrior monster
This card's name becomes "Dark Blade" while on the field or in the GY. Once per turn: You can target 1 Dragon monster on the field or in the GY; equip it to this card. This card gains ATK equal to the ATK of equipped monster. When this card destroys an opponent's monster by battle: You can send 1 monster equipped to this card to the GY; inflict damage to your opponent equal to sent monster's original ATK.

(The picture of Monk Disciple would have him punching a wall to the right, to match his arrow.)

Monk Disciple
Rock/EARTH/Link 1/ATK 1300 Arrow: R
1 Level 3 Rock monster
This card's name becomes "Monk Fighter" while on the field or in the GY. This card can attack all monsters your opponent controls, once each. When this card battles an opponent's monster, while you control no other monsters: You can activate 1 of these effects;
● Add 1 Level 5 or higher Rock monster from your Deck to your hand.
● Take 1 Spell/Trap from your Deck, that specificially lists the card "Monk Fighter" in its text, and either activate it or add it to your hand.

Soitsu (Union that would equip to a Normal Fairy)
Link monster that uses Union monster as material