Eowyn is a Token generating machine with her first triggered ability but apart from her there are also 10 other cards that make tokens
The reality is that casting this card straight up isnt realistic in a Constructed setting
Youve got all the classic instants and sorceries that draw you more cards to give you more gas to cast more instants and sorceries
You can get the only foil version surprisingly cheap, but it wont be cheap for long
The other option is to take advantage of the direct damage, which is good in its own right to either finish off a damaged character or get them within range to be banished but also works with the likes of cards that benefit from being damaged - such as Scroop, Backstabber - that benefit from healing damage, like Rapunzel, Gifted Artist, or from damage being dealt: like Beast, Relentless.
It's an unusual mana dork, asking you to put -0/-1 counters on it to get mana instead of tapping it, which means it can both make mana and block small creatures