Surfing Pikachu is a very special example of this, a promotional card that went on to be referenced elsewhere in the series
The best budget outlets are Viscera Seer (~$0.36), Carrion Feeder (~$3.81), and Goblin Bombardment (~$2.49), with Ashnods Altar (~$14) turning bodies into mana
It also is a free way to discard a land, letting cards that can bring them back to your hand or even straight to the battlefield, like Restore, turn your discarded land into an extra land drop for the turn
Painful Truths: the painful truths are that Converge, Awaken, and Landfall mostly suck in this set
The value of X will be calculated using your commander's current characteristics
During the Standby Phase : You can Fusion Summon 1 Dragon Fusion Monster from your Extra Deck , by shuffling its materials from your field and/or banishment into the Deck