You could add a third reason, which is to test a synergy you want to play, but can't afford to invest hundreds of dollars into without testing it
Parallax Wave (Ext, S, Block) TTW (Temporary Targeted Wrath), the Wave serves as the supreme offensive tool: temporarily get rid of blockers and problem creatures while your beaters get through
You could do fair things with Evil Twin
These are closest in nature to action cards, and are basically a subsection of them
The best card drawing card printed since Urza's Block, hands down, Fact or Fiction is at worst a five-card Impulse, and at the best as a three-card drawing machine
The third installment of the wildly popular Disney Lorcana TCG , Into the Inklands introduces location cards, which feature beloved Disney story settings and offer players special abilities and interactions