Razaketh works in a lot of powerful shells, costs no mana or resource commitment after arriving at the battlefield other than life and creatures, and can give you a lot in return for his service
If this card is Normal or Special Summoned: You can add 1 Level 4 or lower "Salamangreat" monster from your Deck to your hand, except "Salamangreat of Fire", also you cannot Special Summon monsters for the rest of this turn, except FIRE monsters
Gluttonous Troll, on the other hand, is a 4-CMC 3/3 creature that creates one Food Token per opponent you have when it enters, so three in Commander
If either player put any cards on the bottom of their deck in this way, each player draws 4 cards
Dragonpit Magician X WATER Level 7 [ SpellcasterPendulumNormal ] ATK 900 DEF 2700 P Scale 8 Once per turn, if you have a "Magician" card in your other Pendulum Zone: You can discard 1 Pendulum Monster, then target 1 Spell/Trap Card on the field