Solarion

The doubling clause is the whole engine, and it turns Solarion from a one-time entry bonus into an exponential clock. Cast for all five colors and the body arrives as a 5/5; tap once and it is a 10/10, tap again the following turn for 20, then 40, then 80. But the multiplier only matters if the base number is large, so the card pulls in two directions at once: it wants a five-color manabase to maximize the Sunburst count, and it wants the time to sit back and tap an undefended Construct across several turns. Activate with no counters and you have doubled nothing. That contradiction is the design's honesty: the math is absurd, but it only pays out for a deck willing to invest in fixing and then survive long enough to use it. It also reads as a meditation on counters as a resource rather than a stat, an early instance of treating +1/+1 counters as something to manipulate in bulk rather than accumulate one at a time, the same axis later proliferate and counter-doubling effects would exploit. Vulnerable to any removal that ignores toughness, slow to come online, and dependent on a board state that gives it room to breathe, it works less as a creature than as a wager on exponential growth.