Sword of the Animist is fairly cheap and grants +1/+1, and the equipped creature can search the deck for a basic land and put it onto the battlefield each time it attacks -- whether or not it deals damage to a player
The versatility of a ramp spell to get you going early or a reasonable threat that provides continuous value is beautiful
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Thanks to its Plot ability, you often have the luxury to delay casting it until you can protect it in some fashion
When you reveal a creature card this way, put X +1/+1 counters on target creature you control, where X is the mana value of that card
These spells also usually end up being some form of ramp, draw, or removal, which is quite a lot of incidental versatility for the Hellkite to be able to provide