Please refer to the sizing chart provided above to determine the size that is right for your cards.
Like Ohthenoises said, each life-gain event is separate, and each will trigger the Reaver's ability
Credit goes to Pokbeach for spotting this and making a full list of the cards, though I've taken the time to quickly double check
Masons great leap forward will be completed on the next move by Starmie using the energy cards it already has attached, pointlessly attaching an energy card to Drowzee does not change anything
There are also a few small differences in layout and color for these two cards, due to this card being from a newer release, where the Japanese cards had a different style
Card draw and mana ramp are both readily accessible with this planeswalker in your command zone, and as cards like Soul of Windgrace and Wrenn and Six have joined favorites like The Gitrog Monster and fetchlands, the strategy has become incredibly potent and consistent over time