Selvala, Heart of the Wilds 6 Decent enough on theme filler
That's only card draw and this replaces itself and casts things for free each turn and thus impacts the battlefield and gives you uncounterable stuff too instead of drawing you cards and you save mana too so you can cast with discover and then save your mana for instants or tap out for two turns of mana usage from your main phase and this in one turn
Although it's at the bottom of this list today, clearly even the sky isnt the limit for this one
A very neat card that does so much work by itself
If the player can give Aragorn, King of Gondor haste with cards like Lightning Greaves, they can simply flicker him with various white or blue cards like Cloudshift and get the monarchy exactly when they need it to launch their game-winning attack
However, when its a creature, if it would deal combat damage to a creature, it instead makes it so that the owner has to shuffle that creature back into their library