Bounding Felidar

Saddle asks a strange question of a payoff: how much are you willing to hold back before you swing? Tap two power's worth of creatures pre-combat, then attack, and this rewards you for having built wide by anointing every other creature you control with a +1/+1 counter and gaining a point of life for each of them. The tension sits right there in the sequencing. The saddle cost taps attackers, so the very board you want to pump is the board you have just partially committed to standing still, and the counters land on the creatures that stayed home as readily as the ones that came along. That makes it a rebuilding engine as much as an aggressive one: a way to entrench a stalled position, gaining life and permanent size each turn while the 4/7 body feeds counters across your whole board. Mount as a creature type lets a class of cards care about the saddled creature specifically, but the interesting design work here is the deliberate friction between the saddle tap and the go-wide payoff. It is not built to close fast; it is built to make a board that already exists harder to kill and more expensive to race, one attack step at a time.