With decks that are already synergistic, it can be extremely difficult to make additions, and even more difficult to cut cards from the deck
When paired with flicker effects, it asymmetrically obliterates opponents' hands while keeping yours full since you draw additional cards
The red spell Fire Magic, for example, does the same thing, combining the effect of causing damage, which is associated with fire magic in fantasy games, with the typical red concept from MTG of distributing a smaller number of damage points (known as pinging )
In comparison, Gyarados ex has 180 HP, only costs 3 Colorless Energy to retreat, and has a stronger attack
If you are confused by this, help yourself to a detailed analysis on summoning sickness
Sludge Titan Sludge Titan is an awesome card advantage tool, though its high on the mana curve