mtg copy double faced card Can someone explain this? : r/mtg MTG : How works Copying

Hearthhull, the Worldseed turns land-sac into powerful card draw

Draw a card at the beginning of the next turn's upkeep

[61] This codification of rules streamlined many cards, introduced or clarified many terms, removed "the need for multiple artifact types" and "introduced the tap symbol"

Once you tap creatures adding up to two or more power, you turn on its first ability, an anthem effect

First of all, as a blind card, youll almost always reveal a land in the top four, so youll draw a card off it reliably

Phytotitan At this point I dont think I need to explain why a mono-green, six mana, 7/2 creature that returns to the battlefield from the graveyard is amazing