Bre of Clan Stoutarm

The lifegain-into-cascade loop is the design idea here, and the two abilities are built to feed each other. The activated ability hands out lifelink at a cheap tap-and-tax, which is not really about the evasion: it exists to guarantee you gain life on any turn a creature connects. The end-step trigger then reads that life total as fuel, digging until it hits a nonland card and casting it free if its mana value fits under the life you gained that turn. That threshold is the balancing pressure: a big lifelink swing might bankroll a four- or five-drop off the top, but a single point of lifelink damage floors the exile at a one-mana spell (or just puts the card in hand). The friction of the "less than or equal to" clause forces you to actually push damage through if you want to convert it into a free cast, rather than sitting back and grinding. What separates this from earlier free-cast payoffs is that it does not gate on card type or a specific trigger; it converts combat lifegain directly into off-the-top spellcasting, an axis that rewards attacking with lifelinkers rather than parking them. The 4/4 body for four is deliberately unremarkable, because the card wants to be a repeatable engine granting the keyword to a bigger threat, not the beater itself.