yugioh trap cards that negate spells and traps Goat : r/Goat_Format Negate - Yugipedia

For a blue mana, you can create a copy of this and target something else

Even better, Jegantha, the Wellspring isn't just a free card in hand but actually does some powerful things in Niv decks, most notably tapping to cast Niv-Mizzet, Reborn itself (while being a 5/5 creature is also a nice bonus)

10 Safari Zone HD Remaster Common based on Vending Series 2 card Shellder LV

If the creature loses flying before Shadow Puppeteers's last ability resolves, the creature will still become a red Dragon with base power and toughness 4/4 in addition to its other colors and types until end of turn

Randomizer : A tournament-legal coin or, more commonly, a translucent, six-sided die